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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Update patches for linux 2.6.15.
# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 3d7ea7972b39fd276b56393f511742da45ec4d07
# Parent 5d9f4e6c9519eb59467aceac665b0fe9fbbab190
Update patches for linux 2.6.15.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
diff -r 5d9f4e6c9519 -r 3d7ea7972b39
patches/linux-2.6.15/i386-mach-io-check-nmi.patch
--- /dev/null Thu Feb 2 14:10:27 2006
+++ b/patches/linux-2.6.15/i386-mach-io-check-nmi.patch Thu Feb 2 17:16:00 2006
@@ -0,0 +1,45 @@
+diff -pruN ../pristine-linux-2.6.15/arch/i386/kernel/traps.c
./arch/i386/kernel/traps.c
+--- ../pristine-linux-2.6.15/arch/i386/kernel/traps.c 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/kernel/traps.c 2006-02-02 17:14:26.000000000 +0000
+@@ -533,18 +533,11 @@ static void mem_parity_error(unsigned ch
+
+ static void io_check_error(unsigned char reason, struct pt_regs * regs)
+ {
+- unsigned long i;
+-
+ printk("NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+
+ /* Re-enable the IOCK line, wait for a few seconds */
+- reason = (reason & 0xf) | 8;
+- outb(reason, 0x61);
+- i = 2000;
+- while (--i) udelay(1000);
+- reason &= ~8;
+- outb(reason, 0x61);
++ clear_io_check_error(reason);
+ }
+
+ static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/mach-default/mach_traps.h
./include/asm-i386/mach-default/mach_traps.h
+--- ../pristine-linux-2.6.15/include/asm-i386/mach-default/mach_traps.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/mach-default/mach_traps.h 2006-02-02
17:14:26.000000000 +0000
+@@ -15,6 +15,18 @@ static inline void clear_mem_error(unsig
+ outb(reason, 0x61);
+ }
+
++static inline void clear_io_check_error(unsigned char reason)
++{
++ unsigned long i;
++
++ reason = (reason & 0xf) | 8;
++ outb(reason, 0x61);
++ i = 2000;
++ while (--i) udelay(1000);
++ reason &= ~8;
++ outb(reason, 0x61);
++}
++
+ static inline unsigned char get_nmi_reason(void)
+ {
+ return inb(0x61);
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.15/net-csum.patch
--- /dev/null Thu Feb 2 14:10:27 2006
+++ b/patches/linux-2.6.15/net-csum.patch Thu Feb 2 17:16:00 2006
@@ -0,0 +1,46 @@
+diff -pruN ../pristine-linux-2.6.15/net/ipv4/netfilter/ip_nat_proto_tcp.c
./net/ipv4/netfilter/ip_nat_proto_tcp.c
+--- ../pristine-linux-2.6.15/net/ipv4/netfilter/ip_nat_proto_tcp.c
2006-01-03 03:21:10.000000000 +0000
++++ ./net/ipv4/netfilter/ip_nat_proto_tcp.c 2006-02-02 17:14:59.000000000
+0000
+@@ -129,10 +129,16 @@ tcp_manip_pkt(struct sk_buff **pskb,
+ if (hdrsize < sizeof(*hdr))
+ return 1;
+
+- hdr->check = ip_nat_cheat_check(~oldip, newip,
++ if ((*pskb)->proto_csum_blank) {
++ hdr->check = ip_nat_cheat_check(oldip, ~newip,
++ ip_nat_cheat_check(oldport ^ 0xFFFF,
++ newport, hdr->check));
++ } else {
++ hdr->check = ip_nat_cheat_check(~oldip, newip,
+ ip_nat_cheat_check(oldport ^ 0xFFFF,
+ newport,
+ hdr->check));
++ }
+ return 1;
+ }
+
+diff -pruN ../pristine-linux-2.6.15/net/ipv4/netfilter/ip_nat_proto_udp.c
./net/ipv4/netfilter/ip_nat_proto_udp.c
+--- ../pristine-linux-2.6.15/net/ipv4/netfilter/ip_nat_proto_udp.c
2006-01-03 03:21:10.000000000 +0000
++++ ./net/ipv4/netfilter/ip_nat_proto_udp.c 2006-02-02 17:14:59.000000000
+0000
+@@ -113,11 +113,19 @@ udp_manip_pkt(struct sk_buff **pskb,
+ newport = tuple->dst.u.udp.port;
+ portptr = &hdr->dest;
+ }
+- if (hdr->check) /* 0 is a special case meaning no checksum */
+- hdr->check = ip_nat_cheat_check(~oldip, newip,
++
++ if (hdr->check) { /* 0 is a special case meaning no checksum */
++ if ((*pskb)->proto_csum_blank) {
++ hdr->check = ip_nat_cheat_check(oldip, ~newip,
++ ip_nat_cheat_check(*portptr ^ 0xFFFF,
++ newport, hdr->check));
++ } else {
++ hdr->check = ip_nat_cheat_check(~oldip, newip,
+ ip_nat_cheat_check(*portptr ^ 0xFFFF,
+ newport,
+ hdr->check));
++ }
++ }
+ *portptr = newport;
+ return 1;
+ }
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.15/pmd-shared.patch
--- /dev/null Thu Feb 2 14:10:27 2006
+++ b/patches/linux-2.6.15/pmd-shared.patch Thu Feb 2 17:16:00 2006
@@ -0,0 +1,111 @@
+diff -pruN ../pristine-linux-2.6.15/arch/i386/mm/pageattr.c
./arch/i386/mm/pageattr.c
+--- ../pristine-linux-2.6.15/arch/i386/mm/pageattr.c 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/mm/pageattr.c 2006-02-02 17:15:14.000000000 +0000
+@@ -76,7 +76,7 @@ static void set_pmd_pte(pte_t *kpte, uns
+ unsigned long flags;
+
+ set_pte_atomic(kpte, pte); /* change init_mm */
+- if (PTRS_PER_PMD > 1)
++ if (HAVE_SHARED_KERNEL_PMD)
+ return;
+
+ spin_lock_irqsave(&pgd_lock, flags);
+diff -pruN ../pristine-linux-2.6.15/arch/i386/mm/pgtable.c
./arch/i386/mm/pgtable.c
+--- ../pristine-linux-2.6.15/arch/i386/mm/pgtable.c 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/mm/pgtable.c 2006-02-02 17:15:14.000000000 +0000
+@@ -215,9 +215,10 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
+ spin_lock_irqsave(&pgd_lock, flags);
+ }
+
+- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
+- swapper_pg_dir + USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
++ if (PTRS_PER_PMD == 1 || HAVE_SHARED_KERNEL_PMD)
++ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ swapper_pg_dir + USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
+ if (PTRS_PER_PMD > 1)
+ return;
+
+@@ -249,6 +250,30 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ goto out_oom;
+ set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
+ }
++
++ if (!HAVE_SHARED_KERNEL_PMD) {
++ unsigned long flags;
++
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++ if (!pmd)
++ goto out_oom;
++ set_pgd(&pgd[USER_PTRS_PER_PGD], __pgd(1 + __pa(pmd)));
++ }
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ unsigned long v = (unsigned long)i << PGDIR_SHIFT;
++ pgd_t *kpgd = pgd_offset_k(v);
++ pud_t *kpud = pud_offset(kpgd, v);
++ pmd_t *kpmd = pmd_offset(kpud, v);
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ memcpy(pmd, kpmd, PAGE_SIZE);
++ }
++ pgd_list_add(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
++
+ return pgd;
+
+ out_oom:
+@@ -263,9 +288,23 @@ void pgd_free(pgd_t *pgd)
+ int i;
+
+ /* in the PAE case user pgd entries are overwritten before usage */
+- if (PTRS_PER_PMD > 1)
+- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
+- kmem_cache_free(pmd_cache, (void
*)__va(pgd_val(pgd[i])-1));
++ if (PTRS_PER_PMD > 1) {
++ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ kmem_cache_free(pmd_cache, pmd);
++ }
++ if (!HAVE_SHARED_KERNEL_PMD) {
++ unsigned long flags;
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
++ kmem_cache_free(pmd_cache, pmd);
++ }
++ }
++ }
+ /* in the non-PAE case, free_pgtables() clears user pgd entries */
+ kmem_cache_free(pgd_cache, pgd);
+ }
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/pgtable-2level-defs.h
./include/asm-i386/pgtable-2level-defs.h
+--- ../pristine-linux-2.6.15/include/asm-i386/pgtable-2level-defs.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/pgtable-2level-defs.h 2006-02-02 17:15:14.000000000
+0000
+@@ -1,6 +1,8 @@
+ #ifndef _I386_PGTABLE_2LEVEL_DEFS_H
+ #define _I386_PGTABLE_2LEVEL_DEFS_H
+
++#define HAVE_SHARED_KERNEL_PMD 0
++
+ /*
+ * traditional i386 two-level paging structure:
+ */
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/pgtable-3level-defs.h
./include/asm-i386/pgtable-3level-defs.h
+--- ../pristine-linux-2.6.15/include/asm-i386/pgtable-3level-defs.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/pgtable-3level-defs.h 2006-02-02 17:15:14.000000000
+0000
+@@ -1,6 +1,8 @@
+ #ifndef _I386_PGTABLE_3LEVEL_DEFS_H
+ #define _I386_PGTABLE_3LEVEL_DEFS_H
+
++#define HAVE_SHARED_KERNEL_PMD 1
++
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.15/smp-alts.patch
--- /dev/null Thu Feb 2 14:10:27 2006
+++ b/patches/linux-2.6.15/smp-alts.patch Thu Feb 2 17:16:00 2006
@@ -0,0 +1,593 @@
+diff -pruN ../pristine-linux-2.6.15/arch/i386/Kconfig ./arch/i386/Kconfig
+--- ../pristine-linux-2.6.15/arch/i386/Kconfig 2006-01-03 03:21:10.000000000
+0000
++++ ./arch/i386/Kconfig 2006-02-02 17:09:58.000000000 +0000
+@@ -202,6 +202,19 @@ config SMP
+
+ If you don't know what to do here, say N.
+
++config SMP_ALTERNATIVES
++ bool "SMP alternatives support (EXPERIMENTAL)"
++ depends on SMP && EXPERIMENTAL
++ help
++ Try to reduce the overhead of running an SMP kernel on a uniprocessor
++ host slightly by replacing certain key instruction sequences
++ according to whether we currently have more than one CPU available.
++ This should provide a noticeable boost to performance when
++ running SMP kernels on UP machines, and have negligible impact
++ when running on an true SMP host.
++
++ If unsure, say N.
++
+ config NR_CPUS
+ int "Maximum number of CPUs (2-255)"
+ range 2 255
+diff -pruN ../pristine-linux-2.6.15/arch/i386/kernel/Makefile
./arch/i386/kernel/Makefile
+--- ../pristine-linux-2.6.15/arch/i386/kernel/Makefile 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/kernel/Makefile 2006-02-02 17:09:58.000000000 +0000
+@@ -34,6 +34,7 @@ obj-$(CONFIG_ACPI_SRAT) += srat.o
+ obj-$(CONFIG_HPET_TIMER) += time_hpet.o
+ obj-$(CONFIG_EFI) += efi.o efi_stub.o
+ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
++obj-$(CONFIG_SMP_ALTERNATIVES) += smpalts.o
+
+ EXTRA_AFLAGS := -traditional
+
+diff -pruN ../pristine-linux-2.6.15/arch/i386/kernel/smpalts.c
./arch/i386/kernel/smpalts.c
+--- ../pristine-linux-2.6.15/arch/i386/kernel/smpalts.c 1970-01-01
01:00:00.000000000 +0100
++++ ./arch/i386/kernel/smpalts.c 2006-02-02 17:09:58.000000000 +0000
+@@ -0,0 +1,85 @@
++#include <linux/kernel.h>
++#include <asm/system.h>
++#include <asm/smp_alt.h>
++#include <asm/processor.h>
++#include <asm/string.h>
++
++struct smp_replacement_record {
++ unsigned char targ_size;
++ unsigned char smp1_size;
++ unsigned char smp2_size;
++ unsigned char up_size;
++ unsigned char feature;
++ unsigned char data[0];
++};
++
++struct smp_alternative_record {
++ void *targ_start;
++ struct smp_replacement_record *repl;
++};
++
++extern struct smp_alternative_record __start_smp_alternatives_table,
++ __stop_smp_alternatives_table;
++extern unsigned long __init_begin, __init_end;
++
++void prepare_for_smp(void)
++{
++ struct smp_alternative_record *r;
++ printk(KERN_INFO "Enabling SMP...\n");
++ for (r = &__start_smp_alternatives_table;
++ r != &__stop_smp_alternatives_table;
++ r++) {
++ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
++ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
++ BUG_ON(r->repl->targ_size < r->repl->up_size);
++ if (system_state == SYSTEM_RUNNING &&
++ r->targ_start >= (void *)&__init_begin &&
++ r->targ_start < (void *)&__init_end)
++ continue;
++ if (r->repl->feature != (unsigned char)-1 &&
++ boot_cpu_has(r->repl->feature)) {
++ memcpy(r->targ_start,
++ r->repl->data + r->repl->smp1_size,
++ r->repl->smp2_size);
++ memset(r->targ_start + r->repl->smp2_size,
++ 0x90,
++ r->repl->targ_size - r->repl->smp2_size);
++ } else {
++ memcpy(r->targ_start,
++ r->repl->data,
++ r->repl->smp1_size);
++ memset(r->targ_start + r->repl->smp1_size,
++ 0x90,
++ r->repl->targ_size - r->repl->smp1_size);
++ }
++ }
++ /* Paranoia */
++ asm volatile ("jmp 1f\n1:");
++ mb();
++}
++
++void unprepare_for_smp(void)
++{
++ struct smp_alternative_record *r;
++ printk(KERN_INFO "Disabling SMP...\n");
++ for (r = &__start_smp_alternatives_table;
++ r != &__stop_smp_alternatives_table;
++ r++) {
++ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
++ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
++ BUG_ON(r->repl->targ_size < r->repl->up_size);
++ if (system_state == SYSTEM_RUNNING &&
++ r->targ_start >= (void *)&__init_begin &&
++ r->targ_start < (void *)&__init_end)
++ continue;
++ memcpy(r->targ_start,
++ r->repl->data + r->repl->smp1_size + r->repl->smp2_size,
++ r->repl->up_size);
++ memset(r->targ_start + r->repl->up_size,
++ 0x90,
++ r->repl->targ_size - r->repl->up_size);
++ }
++ /* Paranoia */
++ asm volatile ("jmp 1f\n1:");
++ mb();
++}
+diff -pruN ../pristine-linux-2.6.15/arch/i386/kernel/smpboot.c
./arch/i386/kernel/smpboot.c
+--- ../pristine-linux-2.6.15/arch/i386/kernel/smpboot.c 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/kernel/smpboot.c 2006-02-02 17:09:58.000000000 +0000
+@@ -1212,6 +1212,11 @@ static void __init smp_boot_cpus(unsigne
+ if (max_cpus <= cpucount+1)
+ continue;
+
++#ifdef CONFIG_SMP_ALTERNATIVES
++ if (kicked == 1)
++ prepare_for_smp();
++#endif
++
+ if (((cpu = alloc_cpu_id()) <= 0) || do_boot_cpu(apicid, cpu))
+ printk("CPU #%d not responding - cannot use it.\n",
+ apicid);
+@@ -1390,6 +1395,11 @@ int __devinit __cpu_up(unsigned int cpu)
+ return -EIO;
+ }
+
++#ifdef CONFIG_SMP_ALTERNATIVES
++ if (num_online_cpus() == 1)
++ prepare_for_smp();
++#endif
++
+ local_irq_enable();
+ per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
+ /* Unleash the CPU! */
+diff -pruN ../pristine-linux-2.6.15/arch/i386/kernel/vmlinux.lds.S
./arch/i386/kernel/vmlinux.lds.S
+--- ../pristine-linux-2.6.15/arch/i386/kernel/vmlinux.lds.S 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/kernel/vmlinux.lds.S 2006-02-02 17:09:58.000000000 +0000
+@@ -34,6 +34,13 @@ SECTIONS
+ __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
+ __stop___ex_table = .;
+
++ . = ALIGN(16);
++ __start_smp_alternatives_table = .;
++ __smp_alternatives : { *(__smp_alternatives) }
++ __stop_smp_alternatives_table = .;
++
++ __smp_replacements : { *(__smp_replacements) }
++
+ RODATA
+
+ /* writeable */
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/atomic.h
./include/asm-i386/atomic.h
+--- ../pristine-linux-2.6.15/include/asm-i386/atomic.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/atomic.h 2006-02-02 17:09:58.000000000 +0000
+@@ -4,18 +4,13 @@
+ #include <linux/config.h>
+ #include <linux/compiler.h>
+ #include <asm/processor.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * Atomic operations that C can't guarantee us. Useful for
+ * resource counting etc..
+ */
+
+-#ifdef CONFIG_SMP
+-#define LOCK "lock ; "
+-#else
+-#define LOCK ""
+-#endif
+-
+ /*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/bitops.h
./include/asm-i386/bitops.h
+--- ../pristine-linux-2.6.15/include/asm-i386/bitops.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/bitops.h 2006-02-02 17:09:58.000000000 +0000
+@@ -7,6 +7,7 @@
+
+ #include <linux/config.h>
+ #include <linux/compiler.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * These have to be done with inline assembly: that way the bit-setting
+@@ -16,12 +17,6 @@
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ */
+
+-#ifdef CONFIG_SMP
+-#define LOCK_PREFIX "lock ; "
+-#else
+-#define LOCK_PREFIX ""
+-#endif
+-
+ #define ADDR (*(volatile long *) addr)
+
+ /**
+@@ -41,7 +36,7 @@
+ */
+ static inline void set_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btsl %1,%0"
+ :"=m" (ADDR)
+ :"Ir" (nr));
+@@ -76,7 +71,7 @@ static inline void __set_bit(int nr, vol
+ */
+ static inline void clear_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btrl %1,%0"
+ :"=m" (ADDR)
+ :"Ir" (nr));
+@@ -121,7 +116,7 @@ static inline void __change_bit(int nr,
+ */
+ static inline void change_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btcl %1,%0"
+ :"=m" (ADDR)
+ :"Ir" (nr));
+@@ -140,7 +135,7 @@ static inline int test_and_set_bit(int n
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btsl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"=m" (ADDR)
+ :"Ir" (nr) : "memory");
+@@ -180,7 +175,7 @@ static inline int test_and_clear_bit(int
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btrl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"=m" (ADDR)
+ :"Ir" (nr) : "memory");
+@@ -231,7 +226,7 @@ static inline int test_and_change_bit(in
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btcl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"=m" (ADDR)
+ :"Ir" (nr) : "memory");
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/futex.h
./include/asm-i386/futex.h
+--- ../pristine-linux-2.6.15/include/asm-i386/futex.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/futex.h 2006-02-02 17:12:29.000000000 +0000
+@@ -28,7 +28,7 @@
+ "1: movl %2, %0\n\
+ movl %0, %3\n" \
+ insn "\n" \
+-"2: " LOCK_PREFIX "cmpxchgl %3, %2\n\
++"2: " LOCK "cmpxchgl %3, %2\n\
+ jnz 1b\n\
+ 3: .section .fixup,\"ax\"\n\
+ 4: mov %5, %1\n\
+@@ -68,7 +68,7 @@ futex_atomic_op_inuser (int encoded_op,
+ #endif
+ switch (op) {
+ case FUTEX_OP_ADD:
+- __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret,
++ __futex_atomic_op1(LOCK "xaddl %0, %2", ret,
+ oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_OR:
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/rwsem.h
./include/asm-i386/rwsem.h
+--- ../pristine-linux-2.6.15/include/asm-i386/rwsem.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/rwsem.h 2006-02-02 17:09:58.000000000 +0000
+@@ -40,6 +40,7 @@
+
+ #include <linux/list.h>
+ #include <linux/spinlock.h>
++#include <asm/smp_alt.h>
+
+ struct rwsem_waiter;
+
+@@ -99,7 +100,7 @@ static inline void __down_read(struct rw
+ {
+ __asm__ __volatile__(
+ "# beginning down_read\n\t"
+-LOCK_PREFIX " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
++LOCK " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
+ " js 2f\n\t" /* jump if we weren't granted the lock */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -130,7 +131,7 @@ static inline int __down_read_trylock(st
+ " movl %1,%2\n\t"
+ " addl %3,%2\n\t"
+ " jle 2f\n\t"
+-LOCK_PREFIX " cmpxchgl %2,%0\n\t"
++LOCK " cmpxchgl %2,%0\n\t"
+ " jnz 1b\n\t"
+ "2:\n\t"
+ "# ending __down_read_trylock\n\t"
+@@ -150,7 +151,7 @@ static inline void __down_write(struct r
+ tmp = RWSEM_ACTIVE_WRITE_BIAS;
+ __asm__ __volatile__(
+ "# beginning down_write\n\t"
+-LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
++LOCK " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
+ " testl %%edx,%%edx\n\t" /* was the count 0 before? */
+ " jnz 2f\n\t" /* jump if we weren't granted the lock */
+ "1:\n\t"
+@@ -188,7 +189,7 @@ static inline void __up_read(struct rw_s
+ __s32 tmp = -RWSEM_ACTIVE_READ_BIAS;
+ __asm__ __volatile__(
+ "# beginning __up_read\n\t"
+-LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
++LOCK " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
+ " js 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -214,7 +215,7 @@ static inline void __up_write(struct rw_
+ __asm__ __volatile__(
+ "# beginning __up_write\n\t"
+ " movl %2,%%edx\n\t"
+-LOCK_PREFIX " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
++LOCK " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
+ " jnz 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -239,7 +240,7 @@ static inline void __downgrade_write(str
+ {
+ __asm__ __volatile__(
+ "# beginning __downgrade_write\n\t"
+-LOCK_PREFIX " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
++LOCK " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
+ " js 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -263,7 +264,7 @@ LOCK_PREFIX " addl %2,(%%eax)\n\t"
+ static inline void rwsem_atomic_add(int delta, struct rw_semaphore *sem)
+ {
+ __asm__ __volatile__(
+-LOCK_PREFIX "addl %1,%0"
++LOCK "addl %1,%0"
+ : "=m"(sem->count)
+ : "ir"(delta), "m"(sem->count));
+ }
+@@ -276,7 +277,7 @@ static inline int rwsem_atomic_update(in
+ int tmp = delta;
+
+ __asm__ __volatile__(
+-LOCK_PREFIX "xadd %0,(%2)"
++LOCK "xadd %0,(%2)"
+ : "+r"(tmp), "=m"(sem->count)
+ : "r"(sem), "m"(sem->count)
+ : "memory");
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/smp_alt.h
./include/asm-i386/smp_alt.h
+--- ../pristine-linux-2.6.15/include/asm-i386/smp_alt.h 1970-01-01
01:00:00.000000000 +0100
++++ ./include/asm-i386/smp_alt.h 2006-02-02 17:09:58.000000000 +0000
+@@ -0,0 +1,32 @@
++#ifndef __ASM_SMP_ALT_H__
++#define __ASM_SMP_ALT_H__
++
++#include <linux/config.h>
++
++#ifdef CONFIG_SMP
++#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
++#define LOCK \
++ "6677: nop\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6677b\n" \
++ ".long 6678f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6678: .byte 1\n" \
++ ".byte 1\n" \
++ ".byte 0\n" \
++ ".byte 1\n" \
++ ".byte -1\n" \
++ "lock\n" \
++ "nop\n" \
++ ".previous\n"
++void prepare_for_smp(void);
++void unprepare_for_smp(void);
++#else
++#define LOCK "lock ; "
++#endif
++#else
++#define LOCK ""
++#endif
++
++#endif /* __ASM_SMP_ALT_H__ */
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/spinlock.h
./include/asm-i386/spinlock.h
+--- ../pristine-linux-2.6.15/include/asm-i386/spinlock.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/spinlock.h 2006-02-02 17:09:58.000000000 +0000
+@@ -6,6 +6,7 @@
+ #include <asm/page.h>
+ #include <linux/config.h>
+ #include <linux/compiler.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * Your basic SMP spinlocks, allowing only a single CPU anywhere
+@@ -23,7 +24,8 @@
+
+ #define __raw_spin_lock_string \
+ "\n1:\t" \
+- "lock ; decb %0\n\t" \
++ LOCK \
++ "decb %0\n\t" \
+ "jns 3f\n" \
+ "2:\t" \
+ "rep;nop\n\t" \
+@@ -34,7 +36,8 @@
+
+ #define __raw_spin_lock_string_flags \
+ "\n1:\t" \
+- "lock ; decb %0\n\t" \
++ LOCK \
++ "decb %0\n\t" \
+ "jns 4f\n\t" \
+ "2:\t" \
+ "testl $0x200, %1\n\t" \
+@@ -65,10 +68,34 @@ static inline void __raw_spin_lock_flags
+ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
+ {
+ char oldval;
++#ifdef CONFIG_SMP_ALTERNATIVES
+ __asm__ __volatile__(
+- "xchgb %b0,%1"
++ "1:movb %1,%b0\n"
++ "movb $0,%1\n"
++ "2:"
++ ".section __smp_alternatives,\"a\"\n"
++ ".long 1b\n"
++ ".long 3f\n"
++ ".previous\n"
++ ".section __smp_replacements,\"a\"\n"
++ "3: .byte 2b - 1b\n"
++ ".byte 5f-4f\n"
++ ".byte 0\n"
++ ".byte 6f-5f\n"
++ ".byte -1\n"
++ "4: xchgb %b0,%1\n"
++ "5: movb %1,%b0\n"
++ "movb $0,%1\n"
++ "6:\n"
++ ".previous\n"
+ :"=q" (oldval), "=m" (lock->slock)
+ :"0" (0) : "memory");
++#else
++ __asm__ __volatile__(
++ "xchgb %b0,%1\n"
++ :"=q" (oldval), "=m" (lock->slock)
++ :"0" (0) : "memory");
++#endif
+ return oldval > 0;
+ }
+
+@@ -178,12 +205,12 @@ static inline int __raw_write_trylock(ra
+
+ static inline void __raw_read_unlock(raw_rwlock_t *rw)
+ {
+- asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
++ asm volatile(LOCK "incl %0" :"=m" (rw->lock) : : "memory");
+ }
+
+ static inline void __raw_write_unlock(raw_rwlock_t *rw)
+ {
+- asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
++ asm volatile(LOCK "addl $" RW_LOCK_BIAS_STR ", %0"
+ : "=m" (rw->lock) : : "memory");
+ }
+
+diff -pruN ../pristine-linux-2.6.15/include/asm-i386/system.h
./include/asm-i386/system.h
+--- ../pristine-linux-2.6.15/include/asm-i386/system.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/system.h 2006-02-02 17:10:47.000000000 +0000
+@@ -5,7 +5,7 @@
+ #include <linux/kernel.h>
+ #include <asm/segment.h>
+ #include <asm/cpufeature.h>
+-#include <linux/bitops.h> /* for LOCK_PREFIX */
++#include <asm/smp_alt.h>
+
+ #ifdef __KERNEL__
+
+@@ -274,19 +274,19 @@ static inline unsigned long __cmpxchg(vo
+ unsigned long prev;
+ switch (size) {
+ case 1:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgb %b1,%2"
+ : "=a"(prev)
+ : "q"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+ return prev;
+ case 2:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgw %w1,%2"
+ : "=a"(prev)
+ : "r"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+ return prev;
+ case 4:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgl %1,%2"
+ : "=a"(prev)
+ : "r"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+@@ -339,7 +339,7 @@ static inline unsigned long long __cmpxc
+ unsigned long long new)
+ {
+ unsigned long long prev;
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchg8b %3"
++ __asm__ __volatile__(LOCK "cmpxchg8b %3"
+ : "=A"(prev)
+ : "b"((unsigned long)new),
+ "c"((unsigned long)(new >> 32)),
+@@ -506,11 +506,55 @@ struct alt_instr {
+ #endif
+
+ #ifdef CONFIG_SMP
+-#define smp_mb() mb()
+-#define smp_rmb() rmb()
+ #define smp_wmb() wmb()
+-#define smp_read_barrier_depends() read_barrier_depends()
++#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
++#define smp_alt_mb(instr) \
++__asm__ __volatile__("6667:\nnop\nnop\nnop\nnop\nnop\nnop\n6668:\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6667b\n" \
++ ".long 6673f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6673:.byte 6668b-6667b\n" \
++ ".byte 6670f-6669f\n" \
++ ".byte 6671f-6670f\n" \
++ ".byte 0\n" \
++ ".byte %c0\n" \
++ "6669:lock;addl $0,0(%%esp)\n" \
++ "6670:" instr "\n" \
++ "6671:\n" \
++ ".previous\n" \
++ : \
++ : "i" (X86_FEATURE_XMM2) \
++ : "memory")
++#define smp_rmb() smp_alt_mb("lfence")
++#define smp_mb() smp_alt_mb("mfence")
++#define set_mb(var, value) do { \
++unsigned long __set_mb_temp; \
++__asm__ __volatile__("6667:movl %1, %0\n6668:\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6667b\n" \
++ ".long 6673f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6673: .byte 6668b-6667b\n" \
++ ".byte 6670f-6669f\n" \
++ ".byte 0\n" \
++ ".byte 6671f-6670f\n" \
++ ".byte -1\n" \
++ "6669: xchg %1, %0\n" \
++ "6670:movl %1, %0\n" \
++ "6671:\n" \
++ ".previous\n" \
++ : "=m" (var), "=r" (__set_mb_temp) \
++ : "1" (value) \
++ : "memory"); } while (0)
++#else
++#define smp_rmb() rmb()
++#define smp_mb() mb()
+ #define set_mb(var, value) do { xchg(&var, value); } while (0)
++#endif
++#define smp_read_barrier_depends() read_barrier_depends()
+ #else
+ #define smp_mb() barrier()
+ #define smp_rmb() barrier()
diff -r 5d9f4e6c9519 -r 3d7ea7972b39
patches/linux-2.6.14/i386-mach-io-check-nmi.patch
--- a/patches/linux-2.6.14/i386-mach-io-check-nmi.patch Thu Feb 2 14:10:27 2006
+++ /dev/null Thu Feb 2 17:16:00 2006
@@ -1,45 +0,0 @@
-diff -pruN ../pristine-linux-2.6.14/arch/i386/kernel/traps.c
./arch/i386/kernel/traps.c
---- ../pristine-linux-2.6.14/arch/i386/kernel/traps.c 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/kernel/traps.c 2006-01-31 16:15:06.000000000 +0000
-@@ -532,18 +532,11 @@ static void mem_parity_error(unsigned ch
-
- static void io_check_error(unsigned char reason, struct pt_regs * regs)
- {
-- unsigned long i;
--
- printk("NMI: IOCK error (debug interrupt?)\n");
- show_registers(regs);
-
- /* Re-enable the IOCK line, wait for a few seconds */
-- reason = (reason & 0xf) | 8;
-- outb(reason, 0x61);
-- i = 2000;
-- while (--i) udelay(1000);
-- reason &= ~8;
-- outb(reason, 0x61);
-+ clear_io_check_error(reason);
- }
-
- static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/mach-default/mach_traps.h
./include/asm-i386/mach-default/mach_traps.h
---- ../pristine-linux-2.6.14/include/asm-i386/mach-default/mach_traps.h
2005-10-28 01:02:08.000000000 +0100
-+++ ./include/asm-i386/mach-default/mach_traps.h 2006-01-31
16:15:06.000000000 +0000
-@@ -15,6 +15,18 @@ static inline void clear_mem_error(unsig
- outb(reason, 0x61);
- }
-
-+static inline void clear_io_check_error(unsigned char reason)
-+{
-+ unsigned long i;
-+
-+ reason = (reason & 0xf) | 8;
-+ outb(reason, 0x61);
-+ i = 2000;
-+ while (--i) udelay(1000);
-+ reason &= ~8;
-+ outb(reason, 0x61);
-+}
-+
- static inline unsigned char get_nmi_reason(void)
- {
- return inb(0x61);
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.14/net-csum.patch
--- a/patches/linux-2.6.14/net-csum.patch Thu Feb 2 14:10:27 2006
+++ /dev/null Thu Feb 2 17:16:00 2006
@@ -1,46 +0,0 @@
-diff -pruN ../pristine-linux-2.6.14/net/ipv4/netfilter/ip_nat_proto_tcp.c
./net/ipv4/netfilter/ip_nat_proto_tcp.c
---- ../pristine-linux-2.6.14/net/ipv4/netfilter/ip_nat_proto_tcp.c
2005-10-28 01:02:08.000000000 +0100
-+++ ./net/ipv4/netfilter/ip_nat_proto_tcp.c 2006-01-31 16:15:46.000000000
+0000
-@@ -129,10 +129,16 @@ tcp_manip_pkt(struct sk_buff **pskb,
- if (hdrsize < sizeof(*hdr))
- return 1;
-
-- hdr->check = ip_nat_cheat_check(~oldip, newip,
-+ if ((*pskb)->proto_csum_blank) {
-+ hdr->check = ip_nat_cheat_check(oldip, ~newip,
-+ ip_nat_cheat_check(oldport ^ 0xFFFF,
-+ newport, hdr->check));
-+ } else {
-+ hdr->check = ip_nat_cheat_check(~oldip, newip,
- ip_nat_cheat_check(oldport ^ 0xFFFF,
- newport,
- hdr->check));
-+ }
- return 1;
- }
-
-diff -pruN ../pristine-linux-2.6.14/net/ipv4/netfilter/ip_nat_proto_udp.c
./net/ipv4/netfilter/ip_nat_proto_udp.c
---- ../pristine-linux-2.6.14/net/ipv4/netfilter/ip_nat_proto_udp.c
2005-10-28 01:02:08.000000000 +0100
-+++ ./net/ipv4/netfilter/ip_nat_proto_udp.c 2006-01-31 16:15:46.000000000
+0000
-@@ -113,11 +113,19 @@ udp_manip_pkt(struct sk_buff **pskb,
- newport = tuple->dst.u.udp.port;
- portptr = &hdr->dest;
- }
-- if (hdr->check) /* 0 is a special case meaning no checksum */
-- hdr->check = ip_nat_cheat_check(~oldip, newip,
-+
-+ if (hdr->check) { /* 0 is a special case meaning no checksum */
-+ if ((*pskb)->proto_csum_blank) {
-+ hdr->check = ip_nat_cheat_check(oldip, ~newip,
-+ ip_nat_cheat_check(*portptr ^ 0xFFFF,
-+ newport, hdr->check));
-+ } else {
-+ hdr->check = ip_nat_cheat_check(~oldip, newip,
- ip_nat_cheat_check(*portptr ^ 0xFFFF,
- newport,
- hdr->check));
-+ }
-+ }
- *portptr = newport;
- return 1;
- }
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.14/pmd-shared.patch
--- a/patches/linux-2.6.14/pmd-shared.patch Thu Feb 2 14:10:27 2006
+++ /dev/null Thu Feb 2 17:16:00 2006
@@ -1,111 +0,0 @@
-diff -pru ../pristine-linux-2.6.14/arch/i386/mm/pageattr.c
./arch/i386/mm/pageattr.c
---- ../pristine-linux-2.6.14/arch/i386/mm/pageattr.c 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/mm/pageattr.c 2006-01-31 15:49:38.000000000 +0000
-@@ -76,7 +76,7 @@ static void set_pmd_pte(pte_t *kpte, uns
- unsigned long flags;
-
- set_pte_atomic(kpte, pte); /* change init_mm */
-- if (PTRS_PER_PMD > 1)
-+ if (HAVE_SHARED_KERNEL_PMD)
- return;
-
- spin_lock_irqsave(&pgd_lock, flags);
-diff -pru ../pristine-linux-2.6.14/arch/i386/mm/pgtable.c
./arch/i386/mm/pgtable.c
---- ../pristine-linux-2.6.14/arch/i386/mm/pgtable.c 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/mm/pgtable.c 2006-01-31 15:56:50.000000000 +0000
-@@ -212,9 +212,10 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
- spin_lock_irqsave(&pgd_lock, flags);
- }
-
-- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
-- swapper_pg_dir + USER_PTRS_PER_PGD,
-- KERNEL_PGD_PTRS);
-+ if (PTRS_PER_PMD == 1 || HAVE_SHARED_KERNEL_PMD)
-+ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
-+ swapper_pg_dir + USER_PTRS_PER_PGD,
-+ KERNEL_PGD_PTRS);
- if (PTRS_PER_PMD > 1)
- return;
-
-@@ -246,6 +247,30 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
- goto out_oom;
- set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
- }
-+
-+ if (!HAVE_SHARED_KERNEL_PMD) {
-+ unsigned long flags;
-+
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
-+ if (!pmd)
-+ goto out_oom;
-+ set_pgd(&pgd[USER_PTRS_PER_PGD], __pgd(1 + __pa(pmd)));
-+ }
-+
-+ spin_lock_irqsave(&pgd_lock, flags);
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ unsigned long v = (unsigned long)i << PGDIR_SHIFT;
-+ pgd_t *kpgd = pgd_offset_k(v);
-+ pud_t *kpud = pud_offset(kpgd, v);
-+ pmd_t *kpmd = pmd_offset(kpud, v);
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ memcpy(pmd, kpmd, PAGE_SIZE);
-+ }
-+ pgd_list_add(pgd);
-+ spin_unlock_irqrestore(&pgd_lock, flags);
-+ }
-+
- return pgd;
-
- out_oom:
-@@ -260,9 +285,23 @@ void pgd_free(pgd_t *pgd)
- int i;
-
- /* in the PAE case user pgd entries are overwritten before usage */
-- if (PTRS_PER_PMD > 1)
-- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
-- kmem_cache_free(pmd_cache, (void
*)__va(pgd_val(pgd[i])-1));
-+ if (PTRS_PER_PMD > 1) {
-+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ kmem_cache_free(pmd_cache, pmd);
-+ }
-+ if (!HAVE_SHARED_KERNEL_PMD) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&pgd_lock, flags);
-+ pgd_list_del(pgd);
-+ spin_unlock_irqrestore(&pgd_lock, flags);
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
-+ kmem_cache_free(pmd_cache, pmd);
-+ }
-+ }
-+ }
- /* in the non-PAE case, free_pgtables() clears user pgd entries */
- kmem_cache_free(pgd_cache, pgd);
- }
-diff -pru ../pristine-linux-2.6.14/include/asm-i386/pgtable-2level-defs.h
./include/asm-i386/pgtable-2level-defs.h
---- ../pristine-linux-2.6.14/include/asm-i386/pgtable-2level-defs.h
2005-10-28 01:02:08.000000000 +0100
-+++ ./include/asm-i386/pgtable-2level-defs.h 2006-01-31 15:49:38.000000000
+0000
-@@ -1,6 +1,8 @@
- #ifndef _I386_PGTABLE_2LEVEL_DEFS_H
- #define _I386_PGTABLE_2LEVEL_DEFS_H
-
-+#define HAVE_SHARED_KERNEL_PMD 0
-+
- /*
- * traditional i386 two-level paging structure:
- */
-diff -pru ../pristine-linux-2.6.14/include/asm-i386/pgtable-3level-defs.h
./include/asm-i386/pgtable-3level-defs.h
---- ../pristine-linux-2.6.14/include/asm-i386/pgtable-3level-defs.h
2005-10-28 01:02:08.000000000 +0100
-+++ ./include/asm-i386/pgtable-3level-defs.h 2006-01-31 15:49:38.000000000
+0000
-@@ -1,6 +1,8 @@
- #ifndef _I386_PGTABLE_3LEVEL_DEFS_H
- #define _I386_PGTABLE_3LEVEL_DEFS_H
-
-+#define HAVE_SHARED_KERNEL_PMD 1
-+
- /*
- * PGDIR_SHIFT determines what a top-level page table entry can map
- */
diff -r 5d9f4e6c9519 -r 3d7ea7972b39 patches/linux-2.6.14/smp-alts.patch
--- a/patches/linux-2.6.14/smp-alts.patch Thu Feb 2 14:10:27 2006
+++ /dev/null Thu Feb 2 17:16:00 2006
@@ -1,563 +0,0 @@
-diff -pruN ../pristine-linux-2.6.14/arch/i386/Kconfig ./arch/i386/Kconfig
---- ../pristine-linux-2.6.14/arch/i386/Kconfig 2005-10-28 01:02:08.000000000
+0100
-+++ ./arch/i386/Kconfig 2006-01-31 16:05:37.000000000 +0000
-@@ -495,6 +495,19 @@ config SMP
-
- If you don't know what to do here, say N.
-
-+config SMP_ALTERNATIVES
-+ bool "SMP alternatives support (EXPERIMENTAL)"
-+ depends on SMP && EXPERIMENTAL
-+ help
-+ Try to reduce the overhead of running an SMP kernel on a uniprocessor
-+ host slightly by replacing certain key instruction sequences
-+ according to whether we currently have more than one CPU available.
-+ This should provide a noticeable boost to performance when
-+ running SMP kernels on UP machines, and have negligible impact
-+ when running on an true SMP host.
-+
-+ If unsure, say N.
-+
- config NR_CPUS
- int "Maximum number of CPUs (2-255)"
- range 2 255
-diff -pruN ../pristine-linux-2.6.14/arch/i386/kernel/Makefile
./arch/i386/kernel/Makefile
---- ../pristine-linux-2.6.14/arch/i386/kernel/Makefile 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/kernel/Makefile 2006-01-31 16:05:37.000000000 +0000
-@@ -34,6 +34,7 @@ obj-$(CONFIG_ACPI_SRAT) += srat.o
- obj-$(CONFIG_HPET_TIMER) += time_hpet.o
- obj-$(CONFIG_EFI) += efi.o efi_stub.o
- obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-+obj-$(CONFIG_SMP_ALTERNATIVES) += smpalts.o
-
- EXTRA_AFLAGS := -traditional
-
-diff -pruN ../pristine-linux-2.6.14/arch/i386/kernel/smpalts.c
./arch/i386/kernel/smpalts.c
---- ../pristine-linux-2.6.14/arch/i386/kernel/smpalts.c 1970-01-01
01:00:00.000000000 +0100
-+++ ./arch/i386/kernel/smpalts.c 2006-01-31 16:05:37.000000000 +0000
-@@ -0,0 +1,85 @@
-+#include <linux/kernel.h>
-+#include <asm/system.h>
-+#include <asm/smp_alt.h>
-+#include <asm/processor.h>
-+#include <asm/string.h>
-+
-+struct smp_replacement_record {
-+ unsigned char targ_size;
-+ unsigned char smp1_size;
-+ unsigned char smp2_size;
-+ unsigned char up_size;
-+ unsigned char feature;
-+ unsigned char data[0];
-+};
-+
-+struct smp_alternative_record {
-+ void *targ_start;
-+ struct smp_replacement_record *repl;
-+};
-+
-+extern struct smp_alternative_record __start_smp_alternatives_table,
-+ __stop_smp_alternatives_table;
-+extern unsigned long __init_begin, __init_end;
-+
-+void prepare_for_smp(void)
-+{
-+ struct smp_alternative_record *r;
-+ printk(KERN_INFO "Enabling SMP...\n");
-+ for (r = &__start_smp_alternatives_table;
-+ r != &__stop_smp_alternatives_table;
-+ r++) {
-+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
-+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
-+ BUG_ON(r->repl->targ_size < r->repl->up_size);
-+ if (system_state == SYSTEM_RUNNING &&
-+ r->targ_start >= (void *)&__init_begin &&
-+ r->targ_start < (void *)&__init_end)
-+ continue;
-+ if (r->repl->feature != (unsigned char)-1 &&
-+ boot_cpu_has(r->repl->feature)) {
-+ memcpy(r->targ_start,
-+ r->repl->data + r->repl->smp1_size,
-+ r->repl->smp2_size);
-+ memset(r->targ_start + r->repl->smp2_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->smp2_size);
-+ } else {
-+ memcpy(r->targ_start,
-+ r->repl->data,
-+ r->repl->smp1_size);
-+ memset(r->targ_start + r->repl->smp1_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->smp1_size);
-+ }
-+ }
-+ /* Paranoia */
-+ asm volatile ("jmp 1f\n1:");
-+ mb();
-+}
-+
-+void unprepare_for_smp(void)
-+{
-+ struct smp_alternative_record *r;
-+ printk(KERN_INFO "Disabling SMP...\n");
-+ for (r = &__start_smp_alternatives_table;
-+ r != &__stop_smp_alternatives_table;
-+ r++) {
-+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
-+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
-+ BUG_ON(r->repl->targ_size < r->repl->up_size);
-+ if (system_state == SYSTEM_RUNNING &&
-+ r->targ_start >= (void *)&__init_begin &&
-+ r->targ_start < (void *)&__init_end)
-+ continue;
-+ memcpy(r->targ_start,
-+ r->repl->data + r->repl->smp1_size + r->repl->smp2_size,
-+ r->repl->up_size);
-+ memset(r->targ_start + r->repl->up_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->up_size);
-+ }
-+ /* Paranoia */
-+ asm volatile ("jmp 1f\n1:");
-+ mb();
-+}
-diff -pruN ../pristine-linux-2.6.14/arch/i386/kernel/smpboot.c
./arch/i386/kernel/smpboot.c
---- ../pristine-linux-2.6.14/arch/i386/kernel/smpboot.c 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/kernel/smpboot.c 2006-01-31 16:06:47.000000000 +0000
-@@ -1185,6 +1185,11 @@ static void __init smp_boot_cpus(unsigne
- if (max_cpus <= cpucount+1)
- continue;
-
-+#ifdef CONFIG_SMP_ALTERNATIVES
-+ if (kicked == 1)
-+ prepare_for_smp();
-+#endif
-+
- if (((cpu = alloc_cpu_id()) <= 0) || do_boot_cpu(apicid, cpu))
- printk("CPU #%d not responding - cannot use it.\n",
- apicid);
-@@ -1355,6 +1360,11 @@ int __devinit __cpu_up(unsigned int cpu)
- return -EIO;
- }
-
-+#ifdef CONFIG_SMP_ALTERNATIVES
-+ if (num_online_cpus() == 1)
-+ prepare_for_smp();
-+#endif
-+
- local_irq_enable();
- per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
- /* Unleash the CPU! */
-diff -pruN ../pristine-linux-2.6.14/arch/i386/kernel/vmlinux.lds.S
./arch/i386/kernel/vmlinux.lds.S
---- ../pristine-linux-2.6.14/arch/i386/kernel/vmlinux.lds.S 2005-10-28
01:02:08.000000000 +0100
-+++ ./arch/i386/kernel/vmlinux.lds.S 2006-01-31 16:05:37.000000000 +0000
-@@ -34,6 +34,13 @@ SECTIONS
- __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
- __stop___ex_table = .;
-
-+ . = ALIGN(16);
-+ __start_smp_alternatives_table = .;
-+ __smp_alternatives : { *(__smp_alternatives) }
-+ __stop_smp_alternatives_table = .;
-+
-+ __smp_replacements : { *(__smp_replacements) }
-+
- RODATA
-
- /* writeable */
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/atomic.h
./include/asm-i386/atomic.h
---- ../pristine-linux-2.6.14/include/asm-i386/atomic.h 2005-10-28
01:02:08.000000000 +0100
-+++ ./include/asm-i386/atomic.h 2006-01-31 16:05:37.000000000 +0000
-@@ -4,18 +4,13 @@
- #include <linux/config.h>
- #include <linux/compiler.h>
- #include <asm/processor.h>
-+#include <asm/smp_alt.h>
-
- /*
- * Atomic operations that C can't guarantee us. Useful for
- * resource counting etc..
- */
-
--#ifdef CONFIG_SMP
--#define LOCK "lock ; "
--#else
--#define LOCK ""
--#endif
--
- /*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/bitops.h
./include/asm-i386/bitops.h
---- ../pristine-linux-2.6.14/include/asm-i386/bitops.h 2005-10-28
01:02:08.000000000 +0100
-+++ ./include/asm-i386/bitops.h 2006-01-31 16:05:37.000000000 +0000
-@@ -7,6 +7,7 @@
-
- #include <linux/config.h>
- #include <linux/compiler.h>
-+#include <asm/smp_alt.h>
-
- /*
- * These have to be done with inline assembly: that way the bit-setting
-@@ -16,12 +17,6 @@
- * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
- */
-
--#ifdef CONFIG_SMP
--#define LOCK_PREFIX "lock ; "
--#else
--#define LOCK_PREFIX ""
--#endif
--
- #define ADDR (*(volatile long *) addr)
-
- /**
-@@ -41,7 +36,7 @@
- */
- static inline void set_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btsl %1,%0"
- :"=m" (ADDR)
- :"Ir" (nr));
-@@ -76,7 +71,7 @@ static inline void __set_bit(int nr, vol
- */
- static inline void clear_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btrl %1,%0"
- :"=m" (ADDR)
- :"Ir" (nr));
-@@ -121,7 +116,7 @@ static inline void __change_bit(int nr,
- */
- static inline void change_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btcl %1,%0"
- :"=m" (ADDR)
- :"Ir" (nr));
-@@ -140,7 +135,7 @@ static inline int test_and_set_bit(int n
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btsl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"=m" (ADDR)
- :"Ir" (nr) : "memory");
-@@ -180,7 +175,7 @@ static inline int test_and_clear_bit(int
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btrl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"=m" (ADDR)
- :"Ir" (nr) : "memory");
-@@ -231,7 +226,7 @@ static inline int test_and_change_bit(in
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btcl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"=m" (ADDR)
- :"Ir" (nr) : "memory");
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/rwsem.h
./include/asm-i386/rwsem.h
---- ../pristine-linux-2.6.14/include/asm-i386/rwsem.h 2005-10-28
01:02:08.000000000 +0100
-+++ ./include/asm-i386/rwsem.h 2006-01-31 16:05:37.000000000 +0000
-@@ -40,6 +40,7 @@
-
- #include <linux/list.h>
- #include <linux/spinlock.h>
-+#include <asm/smp_alt.h>
-
- struct rwsem_waiter;
-
-@@ -99,7 +100,7 @@ static inline void __down_read(struct rw
- {
- __asm__ __volatile__(
- "# beginning down_read\n\t"
--LOCK_PREFIX " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
-+LOCK " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
- " js 2f\n\t" /* jump if we weren't granted the lock */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -130,7 +131,7 @@ static inline int __down_read_trylock(st
- " movl %1,%2\n\t"
- " addl %3,%2\n\t"
- " jle 2f\n\t"
--LOCK_PREFIX " cmpxchgl %2,%0\n\t"
-+LOCK " cmpxchgl %2,%0\n\t"
- " jnz 1b\n\t"
- "2:\n\t"
- "# ending __down_read_trylock\n\t"
-@@ -150,7 +151,7 @@ static inline void __down_write(struct r
- tmp = RWSEM_ACTIVE_WRITE_BIAS;
- __asm__ __volatile__(
- "# beginning down_write\n\t"
--LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
-+LOCK " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
- " testl %%edx,%%edx\n\t" /* was the count 0 before? */
- " jnz 2f\n\t" /* jump if we weren't granted the lock */
- "1:\n\t"
-@@ -188,7 +189,7 @@ static inline void __up_read(struct rw_s
- __s32 tmp = -RWSEM_ACTIVE_READ_BIAS;
- __asm__ __volatile__(
- "# beginning __up_read\n\t"
--LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
-+LOCK " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
- " js 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -214,7 +215,7 @@ static inline void __up_write(struct rw_
- __asm__ __volatile__(
- "# beginning __up_write\n\t"
- " movl %2,%%edx\n\t"
--LOCK_PREFIX " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
-+LOCK " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
- " jnz 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -239,7 +240,7 @@ static inline void __downgrade_write(str
- {
- __asm__ __volatile__(
- "# beginning __downgrade_write\n\t"
--LOCK_PREFIX " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
-+LOCK " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
- " js 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -263,7 +264,7 @@ LOCK_PREFIX " addl %2,(%%eax)\n\t"
- static inline void rwsem_atomic_add(int delta, struct rw_semaphore *sem)
- {
- __asm__ __volatile__(
--LOCK_PREFIX "addl %1,%0"
-+LOCK "addl %1,%0"
- : "=m"(sem->count)
- : "ir"(delta), "m"(sem->count));
- }
-@@ -276,7 +277,7 @@ static inline int rwsem_atomic_update(in
- int tmp = delta;
-
- __asm__ __volatile__(
--LOCK_PREFIX "xadd %0,(%2)"
-+LOCK "xadd %0,(%2)"
- : "+r"(tmp), "=m"(sem->count)
- : "r"(sem), "m"(sem->count)
- : "memory");
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/smp_alt.h
./include/asm-i386/smp_alt.h
---- ../pristine-linux-2.6.14/include/asm-i386/smp_alt.h 1970-01-01
01:00:00.000000000 +0100
-+++ ./include/asm-i386/smp_alt.h 2006-01-31 16:05:37.000000000 +0000
-@@ -0,0 +1,32 @@
-+#ifndef __ASM_SMP_ALT_H__
-+#define __ASM_SMP_ALT_H__
-+
-+#include <linux/config.h>
-+
-+#ifdef CONFIG_SMP
-+#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
-+#define LOCK \
-+ "6677: nop\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6677b\n" \
-+ ".long 6678f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6678: .byte 1\n" \
-+ ".byte 1\n" \
-+ ".byte 0\n" \
-+ ".byte 1\n" \
-+ ".byte -1\n" \
-+ "lock\n" \
-+ "nop\n" \
-+ ".previous\n"
-+void prepare_for_smp(void);
-+void unprepare_for_smp(void);
-+#else
-+#define LOCK "lock ; "
-+#endif
-+#else
-+#define LOCK ""
-+#endif
-+
-+#endif /* __ASM_SMP_ALT_H__ */
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/spinlock.h
./include/asm-i386/spinlock.h
---- ../pristine-linux-2.6.14/include/asm-i386/spinlock.h 2005-10-28
01:02:08.000000000 +0100
-+++ ./include/asm-i386/spinlock.h 2006-01-31 16:09:52.000000000 +0000
-@@ -6,6 +6,7 @@
- #include <asm/page.h>
- #include <linux/config.h>
- #include <linux/compiler.h>
-+#include <asm/smp_alt.h>
-
- /*
- * Your basic SMP spinlocks, allowing only a single CPU anywhere
-@@ -23,7 +24,8 @@
-
- #define __raw_spin_lock_string \
- "\n1:\t" \
-- "lock ; decb %0\n\t" \
-+ LOCK \
-+ "decb %0\n\t" \
- "jns 3f\n" \
- "2:\t" \
- "rep;nop\n\t" \
-@@ -34,7 +36,8 @@
-
- #define __raw_spin_lock_string_flags \
- "\n1:\t" \
-- "lock ; decb %0\n\t" \
-+ LOCK \
-+ "decb %0\n\t" \
- "jns 4f\n\t" \
- "2:\t" \
- "testl $0x200, %1\n\t" \
-@@ -65,10 +68,34 @@ static inline void __raw_spin_lock_flags
- static inline int __raw_spin_trylock(raw_spinlock_t *lock)
- {
- char oldval;
-+#ifdef CONFIG_SMP_ALTERNATIVES
- __asm__ __volatile__(
-- "xchgb %b0,%1"
-+ "1:movb %1,%b0\n"
-+ "movb $0,%1\n"
-+ "2:"
-+ ".section __smp_alternatives,\"a\"\n"
-+ ".long 1b\n"
-+ ".long 3f\n"
-+ ".previous\n"
-+ ".section __smp_replacements,\"a\"\n"
-+ "3: .byte 2b - 1b\n"
-+ ".byte 5f-4f\n"
-+ ".byte 0\n"
-+ ".byte 6f-5f\n"
-+ ".byte -1\n"
-+ "4: xchgb %b0,%1\n"
-+ "5: movb %1,%b0\n"
-+ "movb $0,%1\n"
-+ "6:\n"
-+ ".previous\n"
- :"=q" (oldval), "=m" (lock->slock)
- :"0" (0) : "memory");
-+#else
-+ __asm__ __volatile__(
-+ "xchgb %b0,%1\n"
-+ :"=q" (oldval), "=m" (lock->slock)
-+ :"0" (0) : "memory");
-+#endif
- return oldval > 0;
- }
-
-@@ -178,12 +205,12 @@ static inline int __raw_write_trylock(ra
-
- static inline void __raw_read_unlock(raw_rwlock_t *rw)
- {
-- asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
-+ asm volatile(LOCK "incl %0" :"=m" (rw->lock) : : "memory");
- }
-
- static inline void __raw_write_unlock(raw_rwlock_t *rw)
- {
-- asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
-+ asm volatile(LOCK "addl $" RW_LOCK_BIAS_STR ", %0"
- : "=m" (rw->lock) : : "memory");
- }
-
-diff -pruN ../pristine-linux-2.6.14/include/asm-i386/system.h
./include/asm-i386/system.h
---- ../pristine-linux-2.6.14/include/asm-i386/system.h 2005-10-28
01:02:08.000000000 +0100
-+++ ./include/asm-i386/system.h 2006-01-31 16:05:37.000000000 +0000
-@@ -5,7 +5,7 @@
- #include <linux/kernel.h>
- #include <asm/segment.h>
- #include <asm/cpufeature.h>
--#include <linux/bitops.h> /* for LOCK_PREFIX */
-+#include <asm/smp_alt.h>
-
- #ifdef __KERNEL__
-
-@@ -267,19 +267,19 @@ static inline unsigned long __cmpxchg(vo
- unsigned long prev;
- switch (size) {
- case 1:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgb %b1,%2"
- : "=a"(prev)
- : "q"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
- return prev;
- case 2:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgw %w1,%2"
- : "=a"(prev)
- : "q"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
- return prev;
- case 4:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgl %1,%2"
- : "=a"(prev)
- : "q"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
-@@ -443,11 +443,55 @@ struct alt_instr {
- #endif
-
- #ifdef CONFIG_SMP
--#define smp_mb() mb()
--#define smp_rmb() rmb()
- #define smp_wmb() wmb()
--#define smp_read_barrier_depends() read_barrier_depends()
-+#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
-+#define smp_alt_mb(instr) \
-+__asm__ __volatile__("6667:\nnop\nnop\nnop\nnop\nnop\nnop\n6668:\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6667b\n" \
-+ ".long 6673f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6673:.byte 6668b-6667b\n" \
-+ ".byte 6670f-6669f\n" \
-+ ".byte 6671f-6670f\n" \
-+ ".byte 0\n" \
-+ ".byte %c0\n" \
-+ "6669:lock;addl $0,0(%%esp)\n" \
-+ "6670:" instr "\n" \
-+ "6671:\n" \
-+ ".previous\n" \
-+ : \
-+ : "i" (X86_FEATURE_XMM2) \
-+ : "memory")
-+#define smp_rmb() smp_alt_mb("lfence")
-+#define smp_mb() smp_alt_mb("mfence")
-+#define set_mb(var, value) do { \
-+unsigned long __set_mb_temp; \
-+__asm__ __volatile__("6667:movl %1, %0\n6668:\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6667b\n" \
-+ ".long 6673f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6673: .byte 6668b-6667b\n" \
-+ ".byte 6670f-6669f\n" \
-+ ".byte 0\n" \
-+ ".byte 6671f-6670f\n" \
-+ ".byte -1\n" \
-+ "6669: xchg %1, %0\n" \
-+ "6670:movl %1, %0\n" \
-+ "6671:\n" \
-+ ".previous\n" \
-+ : "=m" (var), "=r" (__set_mb_temp) \
-+ : "1" (value) \
-+ : "memory"); } while (0)
-+#else
-+#define smp_rmb() rmb()
-+#define smp_mb() mb()
- #define set_mb(var, value) do { xchg(&var, value); } while (0)
-+#endif
-+#define smp_read_barrier_depends() read_barrier_depends()
- #else
- #define smp_mb() barrier()
- #define smp_rmb() barrier()
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