Messages in this thread Patch in this message | | | Date | Sun, 13 Sep 2009 15:02:35 GMT | From | tip-bot for Jiri Olsa <> | Subject | [tip:tracing/core] tracing/function-graph: x86_64 stack allocation cleanup |
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Commit-ID: 4818d80942b7c0021d213b7c5f1a14a832820a01 Gitweb: http://git.kernel.org/tip/4818d80942b7c0021d213b7c5f1a14a832820a01 Author: Jiri Olsa <jolsa@redhat.com> AuthorDate: Wed, 29 Jul 2009 10:58:37 +0200 Committer: Steven Rostedt <rostedt@goodmis.org> CommitDate: Sat, 12 Sep 2009 22:13:43 -0400
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>
--- 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 c251be7..d59fe32 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
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