[Xen-devel] [PATCH] linux/i386: eliminate KM_SWIOTLB

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

. and thus the need for a Xen-specific kmap_types.h.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: sle10-sp1-2007-01-10/include/asm-i386/mach-xen/asm/kmap_types.h
===================================================================
--- sle10-sp1-2007-01-10.orig/include/asm-i386/mach-xen/asm/kmap_types.h        
2007-01-10 10:19:33.000000000 +0100
+++ /dev/null   1970-01-01 00:00:00.000000000 +0000
@@ -1,32 +0,0 @@
-#ifndef _ASM_KMAP_TYPES_H
-#define _ASM_KMAP_TYPES_H
-
-#include <linux/config.h>
-
-#ifdef CONFIG_DEBUG_HIGHMEM
-# define D(n) __KM_FENCE_##n ,
-#else
-# define D(n)
-#endif
-
-enum km_type {
-D(0)   KM_BOUNCE_READ,
-D(1)   KM_SKB_SUNRPC_DATA,
-D(2)   KM_SKB_DATA_SOFTIRQ,
-D(3)   KM_USER0,
-D(4)   KM_USER1,
-D(5)   KM_BIO_SRC_IRQ,
-D(6)   KM_BIO_DST_IRQ,
-D(7)   KM_PTE0,
-D(8)   KM_PTE1,
-D(9)   KM_IRQ0,
-D(10)  KM_IRQ1,
-D(11)  KM_SOFTIRQ0,
-D(12)  KM_SOFTIRQ1,
-D(13)  KM_SWIOTLB,
-D(14)  KM_TYPE_NR
-};
-
-#undef D
-
-#endif
Index: sle10-sp1-2007-01-10/arch/i386/kernel/swiotlb.c
===================================================================
--- sle10-sp1-2007-01-10.orig/arch/i386/kernel/swiotlb.c        2007-01-10 
10:19:56.000000000 +0100
+++ sle10-sp1-2007-01-10/arch/i386/kernel/swiotlb.c     2007-01-10 
10:14:54.000000000 +0100
@@ -238,9 +238,12 @@ __sync_single(struct phys_addr buffer, c
                char *dev, *host, *kmp;
                len = size;
                while (len != 0) {
+                       unsigned long flags;
+
                        if (((bytes = len) + buffer.offset) > PAGE_SIZE)
                                bytes = PAGE_SIZE - buffer.offset;
-                       kmp  = kmap_atomic(buffer.page, KM_SWIOTLB);
+                       local_irq_save(flags);
+                       kmp  = kmap_atomic(buffer.page, KM_BOUNCE_READ);
                        dev  = dma_addr + size - len;
                        host = kmp + buffer.offset;
                        if (dir == DMA_FROM_DEVICE) {
@@ -248,7 +251,8 @@ __sync_single(struct phys_addr buffer, c
                                        /* inaccessible */;
                        } else
                                memcpy(dev, host, bytes);
-                       kunmap_atomic(kmp, KM_SWIOTLB);
+                       kunmap_atomic(kmp, KM_BOUNCE_READ);
+                       local_irq_restore(flags);
                        len -= bytes;
                        buffer.page++;
                        buffer.offset = 0;


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