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authorFrederic Weisbecker <fweisbec@gmail.com>2011-07-02 15:03:44 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2011-07-02 18:06:21 +0200
commit48ffee7d9e6df51b4957bed64115b7beed671374 (patch)
tree657683cd028ed2e34aabfcc33ad2c0e2d04952ae /arch
parentx86,64: Separate arg1 from rbp handling in SAVE_REGS_IRQ (diff)
downloadlinux-48ffee7d9e6df51b4957bed64115b7beed671374.tar.xz
linux-48ffee7d9e6df51b4957bed64115b7beed671374.zip
x86: Remove useless unwinder backlink from irq regs saving
The unwinder backlink in interrupt entry is very useless. It's actually not part of the stack frame chain and thus is never used. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jan Beulich <JBeulich@novell.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/entry_64.S1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 20dc8e6b6d80..6131432c5afa 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -327,7 +327,6 @@ ENDPROC(native_usergs_sysret64)
jne 2f
mov PER_CPU_VAR(irq_stack_ptr),%rsp
EMPTY_FRAME 0
- pushq_cfi %rbp /* backlink for unwinder */
/*
* We entered an interrupt context - irqs are off:
*/