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Commit 1dc1c6ad authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Ingo Molnar
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tracing/function-return-tracer: call prepare_ftrace_return by registers



Impact: Optimize a bit the function return tracer

This patch changes the calling convention of prepare_ftrace_return to
pass its arguments by register. This will optimize it a bit and
prepare it to support dynamic tracing.

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 62d59d17
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+1 −4
Original line number Diff line number Diff line
@@ -1217,12 +1217,9 @@ trace_return:
	pushl %eax
	pushl %ecx
	pushl %edx
	movl 0xc(%esp), %eax
	pushl %eax
	movl 0xc(%esp), %edx
	lea 0x4(%ebp), %eax
	pushl %eax
	call prepare_ftrace_return
	addl $8, %esp
	popl %edx
	popl %ecx
	popl %eax
+0 −1
Original line number Diff line number Diff line
@@ -95,7 +95,6 @@ unsigned long ftrace_return_to_handler(void)
 * Hook the return address and push it in the stack of return addrs
 * in current thread info.
 */
asmlinkage
void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
{
	unsigned long old;