diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2009-07-29 10:58:37 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-09-12 22:13:43 -0400 |
| commit | 4818d80942b7c0021d213b7c5f1a14a832820a01 (patch) | |
| tree | 6f4a18e6c4d5ab2939e208577f00e8a646d7713b | |
| parent | 4b3b4c5e64ce26612646867ee354373620063534 (diff) | |
| download | lwn-4818d80942b7c0021d213b7c5f1a14a832820a01.tar.gz lwn-4818d80942b7c0021d213b7c5f1a14a832820a01.zip | |
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>
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index c251be745107..d59fe323807e 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -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 |