i386 syscall audit fast-path

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This adds fast paths for 32-bit syscall entry and exit when
TIF_SYSCALL_AUDIT is set, but no other kind of syscall tracing.
These paths does not need to save and restore all registers as
the general case of tracing does.  Avoiding the iret return path
when syscall audit is enabled helps performance a lot.

Signed-off-by: Roland McGrath <roland@redhat.com>

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Roland McGrath 2008-06-24 04:16:52 -07:00

parent 5cbf1565f2

commit af0575bba0

1 changed files with 53 additions and 2 deletions

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arch/x86/kernel/entry_32.S

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