[Xen-changelog] [xen-unstable] x86 acpi: Delete unnecessary and broken RSDP-scanning code.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1238428106 -3600
# Node ID d5ddc782bc499a3605417eeef519b33616402768
# Parent  e54eeff2de547b173ee13557157e05ce3e3c3fe1
x86 acpi: Delete unnecessary and broken RSDP-scanning code.

Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
---
 xen/arch/ia64/linux-xen/acpi.c |    4 ---
 xen/arch/x86/acpi/boot.c       |   49 -----------------------------------------
 xen/include/xen/acpi.h         |    1 
 3 files changed, 54 deletions(-)

diff -r e54eeff2de54 -r d5ddc782bc49 xen/arch/ia64/linux-xen/acpi.c
--- a/xen/arch/ia64/linux-xen/acpi.c    Fri Mar 27 11:07:11 2009 +0900
+++ b/xen/arch/ia64/linux-xen/acpi.c    Mon Mar 30 16:48:26 2009 +0100
@@ -76,11 +76,7 @@ unsigned long acpi_wakeup_address = 0;
 unsigned long acpi_wakeup_address = 0;
 
 #ifdef CONFIG_IA64_GENERIC
-#ifndef XEN
 static unsigned long __init acpi_find_rsdp(void)
-#else
-unsigned long __init acpi_find_rsdp(void)
-#endif
 {
        unsigned long rsdp_phys = 0;
 
diff -r e54eeff2de54 -r d5ddc782bc49 xen/arch/x86/acpi/boot.c
--- a/xen/arch/x86/acpi/boot.c  Fri Mar 27 11:07:11 2009 +0900
+++ b/xen/arch/x86/acpi/boot.c  Mon Mar 30 16:48:26 2009 +0100
@@ -283,25 +283,6 @@ acpi_parse_nmi_src(struct acpi_subtable_
 
 #endif /* CONFIG_X86_IO_APIC */
 
-static unsigned long __init
-acpi_scan_rsdp(unsigned long start, unsigned long length)
-{
-       unsigned long offset = 0;
-       unsigned long sig_len = sizeof("RSD PTR ") - 1;
-
-       /*
-        * Scan all 16-byte boundaries of the physical memory region for the
-        * RSDP signature.
-        */
-       for (offset = 0; offset < length; offset += 16) {
-               if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
-                       continue;
-               return (start + offset);
-       }
-
-       return 0;
-}
-
 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 {
        struct acpi_table_boot *sb;
@@ -371,15 +352,8 @@ static void __init
 static void __init
 acpi_fadt_parse_sleep_info(struct acpi_table_fadt *fadt)
 {
-       struct acpi_table_rsdp *rsdp;
-       unsigned long rsdp_phys;
        struct acpi_table_facs *facs = NULL;
        uint64_t facs_pa;
-
-       rsdp_phys = acpi_find_rsdp();
-       if (!rsdp_phys || acpi_disabled)
-               goto bad;
-       rsdp = __va(rsdp_phys);
 
        acpi_fadt_copy_address(pm1a_cnt, pm1a_control, pm1_control);
        acpi_fadt_copy_address(pm1b_cnt, pm1b_control, pm1_control);
@@ -483,29 +457,6 @@ static int __init acpi_parse_fadt(struct
        return 0;
 }
 
-unsigned long __init acpi_find_rsdp(void)
-{
-       unsigned long rsdp_phys = 0;
-
-#if 0
-       if (efi_enabled) {
-               if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
-                       return efi.acpi20;
-               else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
-                       return efi.acpi;
-       }
-#endif
-       /*
-        * Scan memory looking for the RSDP signature. First search EBDA (low
-        * memory) paragraphs and then search upper memory (E0000-FFFFF).
-        */
-       rsdp_phys = acpi_scan_rsdp(0, 0x400);
-       if (!rsdp_phys)
-               rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
-
-       return rsdp_phys;
-}
-
 #ifdef CONFIG_X86_LOCAL_APIC
 /*
  * Parse LAPIC entries in MADT
diff -r e54eeff2de54 -r d5ddc782bc49 xen/include/xen/acpi.h
--- a/xen/include/xen/acpi.h    Fri Mar 27 11:07:11 2009 +0900
+++ b/xen/include/xen/acpi.h    Mon Mar 30 16:48:26 2009 +0100
@@ -282,7 +282,6 @@ typedef int (*acpi_table_entry_handler) 
 
 unsigned int acpi_get_processor_id (unsigned int cpu);
 char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
-unsigned long acpi_find_rsdp (void);
 int acpi_boot_init (void);
 int acpi_boot_table_init (void);
 int acpi_numa_init (void);

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