PWN-Hunter/android_kernel_xiaomi_sdm845
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x86: use v8086_mode helper, trivial unification

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Use v8086_mode inline in fault_32.c, no functional change
also ifdef the section for 32-bit only and add to fault_64.c

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Harvey Harrison 2008-01-30 13:33:23 +01:00 committed by Ingo Molnar
parent 5f5cd8fd60
commit d729ab35ee
2 changed files with 14 additions and 1 deletions
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4
arch/x86/mm/fault_32.c
View File

@ -475,14 +475,16 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
else
tsk->min_flt++;
#ifdef CONFIG_X86_32
/*
* Did it hit the DOS screen memory VA from vm86 mode?
*/
if (regs->flags & VM_MASK) {
if (v8086_mode(regs)) {
unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
if (bit < 32)
tsk->thread.screen_bitmap |= 1 << bit;
}
#endif
up_read(&mm->mmap_sem);
return;

11
arch/x86/mm/fault_64.c
View File

@ -514,6 +514,17 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
tsk->maj_flt++;
else
tsk->min_flt++;
#ifdef CONFIG_X86_32
/*
* Did it hit the DOS screen memory VA from vm86 mode?
*/
if (v8086_mode(regs)) {
unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
if (bit < 32)
tsk->thread.screen_bitmap |= 1 << bit;
}
#endif
up_read(&mm->mmap_sem);
return;