diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2008-11-12 22:49:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 23:15:43 +0100 |
| commit | 1dc1c6adf38bc5799d1594681645ced40ced4b6b (patch) | |
| tree | 5b08e2143631239ef1663bf2e1c1c18bcaabb5f3 /arch/x86 | |
| parent | 62d59d17a5f98edb48b171742dfa531488802f07 (diff) | |
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: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/ftrace.c | 1 |
2 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 9a0ac85946d..f9762114983 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -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 diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index 1db0e121a3e..fe832738e1e 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -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; |