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linux-sg2042
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[PATCH] don't use flush_tlb_all in suspend time 

flush_tlb_all uses on_each_cpu, which will disable/enable interrupt.
In suspend/resume time, this will make interrupt wrongly enabled.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Shaohua Li 2006-06-23 02:04:49 -07:00 committed by Linus Torvalds
parent 968808b895
commit 55b2355eef
4 changed files with 10 additions and 21 deletions
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19
arch/i386/kernel/acpi/sleep.c
View File

@ -8,30 +8,17 @@
#include <linux/acpi.h>
#include <linux/bootmem.h>
#include <linux/dmi.h>
#include <linux/cpumask.h>
#include <asm/smp.h>
#include <asm/tlbflush.h>
/* address in low memory of the wakeup routine. */
unsigned long acpi_wakeup_address = 0;
unsigned long acpi_video_flags;
extern char wakeup_start, wakeup_end;
extern void zap_low_mappings(void);
extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
static void init_low_mapping(pgd_t * pgd, int pgd_limit)
{
int pgd_ofs = 0;
while ((pgd_ofs < pgd_limit)
&& (pgd_ofs + USER_PTRS_PER_PGD < PTRS_PER_PGD)) {
set_pgd(pgd, *(pgd + USER_PTRS_PER_PGD));
pgd_ofs++, pgd++;
}
flush_tlb_all();
}
/**
* acpi_save_state_mem - save kernel state
*
@ -42,7 +29,6 @@ int acpi_save_state_mem(void)
{
if (!acpi_wakeup_address)
return 1;
init_low_mapping(swapper_pg_dir, USER_PTRS_PER_PGD);
memcpy((void *)acpi_wakeup_address, &wakeup_start,
&wakeup_end - &wakeup_start);
acpi_copy_wakeup_routine(acpi_wakeup_address);
@ -55,7 +41,6 @@ int acpi_save_state_mem(void)
*/
void acpi_restore_state_mem(void)
{
zap_low_mappings();
}
/**

2
arch/i386/kernel/acpi/wakeup.S
View File

@ -56,7 +56,7 @@ wakeup_code:
1:
# set up page table
movl $swapper_pg_dir-__PAGE_OFFSET, %eax
movl $swsusp_pg_dir-__PAGE_OFFSET, %eax
movl %eax, %cr3
testl $1, real_efer_save_restore - wakeup_code

3
arch/i386/mm/init.c
View File

@ -29,6 +29,7 @@
#include <linux/efi.h>
#include <linux/memory_hotplug.h>
#include <linux/initrd.h>
#include <linux/cpumask.h>
#include <asm/processor.h>
#include <asm/system.h>
@ -384,7 +385,7 @@ static void __init pagetable_init (void)
#endif
}
#ifdef CONFIG_SOFTWARE_SUSPEND
#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI_SLEEP)
/*
* Swap suspend & friends need this for resume because things like the intel-agp
* driver might have split up a kernel 4MB mapping.

7
arch/x86_64/kernel/acpi/sleep.c
View File

@ -35,6 +35,8 @@
#include <linux/pci.h>
#include <linux/bootmem.h>
#include <linux/acpi.h>
#include <linux/cpumask.h>
#include <asm/mpspec.h>
#include <asm/io.h>
#include <asm/apic.h>
@ -66,7 +68,8 @@ static void init_low_mapping(void)
pgd_t *slot0 = pgd_offset(current->mm, 0UL);
low_ptr = *slot0;
set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
flush_tlb_all();
WARN_ON(num_online_cpus() != 1);
local_flush_tlb();
}
/**
@ -92,7 +95,7 @@ int acpi_save_state_mem(void)
void acpi_restore_state_mem(void)
{
set_pgd(pgd_offset(current->mm, 0UL), low_ptr);
flush_tlb_all();
local_flush_tlb();
}
/**