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authorMasami Hiramatsu <mhiramat@redhat.com>2009-11-05 11:03:59 -0500
committerIngo Molnar <mingo@elte.hu>2009-11-08 11:57:13 +0100
commitc12a229bc5971534537a7d0e49e44f9f1f5d0336 (patch)
treeb1b1edeefa6ead19532942a91e162e33913ecff0
parent97829de5a3b88899c5f3ac8802d11868bf4180ba (diff)
downloadblackbird-op-linux-c12a229bc5971534537a7d0e49e44f9f1f5d0336.tar.gz
blackbird-op-linux-c12a229bc5971534537a7d0e49e44f9f1f5d0336.zip
x86: Remove unused thread_return label from switch_to()
Remove unused thread_return label from switch_to() macro on x86-64. Since this symbol cuts into schedule(), backtrace at the latter half of schedule() was always shown as thread_return(). Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20091105160359.5181.26225.stgit@harusame> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/include/asm/system.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h
index f08f97374892..1a953e26401c 100644
--- a/arch/x86/include/asm/system.h
+++ b/arch/x86/include/asm/system.h
@@ -128,8 +128,6 @@ do { \
"movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \
"movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */ \
"call __switch_to\n\t" \
- ".globl thread_return\n" \
- "thread_return:\n\t" \
"movq "__percpu_arg([current_task])",%%rsi\n\t" \
__switch_canary \
"movq %P[thread_info](%%rsi),%%r8\n\t" \
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