[Dle-develop] [tip:x86/asm] x86: Remove unused thread_return label from switch_to()

[tip-bot f. M. H. <mhi...@re...>]

Commit-ID:  c12a229bc5971534537a7d0e49e44f9f1f5d0336
Gitweb:     http://git.kernel.org/tip/c12a229bc5971534537a7d0e49e44f9f1f5d0336
Author:     Masami Hiramatsu <mhi...@re...>
AuthorDate: Thu, 5 Nov 2009 11:03:59 -0500
Committer:  Ingo Molnar <mi...@el...>
CommitDate: Sun, 8 Nov 2009 11:57:13 +0100

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 <mhi...@re...>
Cc: systemtap <sys...@so...>
Cc: DLE <dle...@li...>
LKML-Reference: <20091105160359.5181.26225.stgit@harusame>
Signed-off-by: Ingo Molnar <mi...@el...>
---
 arch/x86/include/asm/system.h |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h
index f08f973..1a953e2 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"			  \