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authorBrian Gerst <brgerst@gmail.com>2016-08-13 19:38:21 +0300
committerIngo Molnar <mingo@kernel.org>2016-08-24 13:31:51 +0300
commitffcb043ba524d3fbd979a9dac2c9ce8ad352000d (patch)
tree3fe8cc4bd80dfc40819387cb966c1fdb0ef18bf9 /arch/x86/kernel/process_32.c
parent616d24835eeafa8ef3466479db028abfdfc77531 (diff)
downloadlinux-ffcb043ba524d3fbd979a9dac2c9ce8ad352000d.tar.xz
sched/x86: Fix thread_saved_pc()
thread_saved_pc() was using a completely bogus method to get the return address. Since switch_to() was previously inlined, there was no sane way to know where on the stack the return address was stored. Now with the frame of a sleeping thread well defined, this can be implemented correctly. Signed-off-by: Brian Gerst <brgerst@gmail.com> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1471106302-10159-7-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process_32.c')
-rw-r--r--arch/x86/kernel/process_32.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 18714a191b2d..404efdfa083b 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -55,14 +55,6 @@
#include <asm/switch_to.h>
#include <asm/vm86.h>
-/*
- * Return saved PC of a blocked thread.
- */
-unsigned long thread_saved_pc(struct task_struct *tsk)
-{
- return ((unsigned long *)tsk->thread.sp)[3];
-}
-
void __show_regs(struct pt_regs *regs, int all)
{
unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;