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Commit c12a229b authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Ingo Molnar
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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: default avatarMasami 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: default avatarIngo Molnar <mingo@elte.hu>
parent 97829de5

arch/x86/include/asm/system.h

+0 −2
Original line number Diff line number Diff line
@@ -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"			  \