ftrace: x86 mcount stub

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x86 now sets up the mcount locations through the build and no longer
needs to record the ip when the function is executed. This patch changes
the initial mcount to simply return. There's no need to do any other work.
If the ftrace start up test fails, the original mcount will be what everything
will use, so having this as fast as possible is a good thing.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Steven Rostedt 2008-08-14 15:45:12 -04:00 • committed by Ingo Molnar

parent e4b2b88661

commit 0a37605c22

3 changed files with 2 additions and 52 deletions

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14

arch/x86/kernel/entry_32.S

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26

arch/x86/kernel/entry_64.S

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14

arch/x86/kernel/ftrace.c

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