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Commit 4818d809 authored Jul 29, 2009 by Jiri Olsa Committed by Steven Rostedt Sep 12, 2009

tracing/function-graph: x86_64 stack allocation cleanup



Only 24 bytes needs to be reserved on the stack for the function graph
tracer on x86_64.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <20090729085837.GB4998@jolsa.lab.eng.brq.redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

parent 4b3b4c5e

arch/x86/kernel/entry_64.S

+3 −3

Original line number	Diff line number	Diff line
		@@ -146,7 +146,7 @@ ENTRY(ftrace_graph_caller)
		END(ftrace_graph_caller)

		GLOBAL(return_to_handler)
		subq $80, %rsp
		subq $24, %rsp

		/* Save the return values */
		movq %rax, (%rsp)
		@@ -155,10 +155,10 @@ GLOBAL(return_to_handler)

		call ftrace_return_to_handler

		movq %rax, 72(%rsp)
		movq %rax, 16(%rsp)
		movq 8(%rsp), %rdx
		movq (%rsp), %rax
		addq $72, %rsp
		addq $16, %rsp
		retq
		#endif