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Commit 86a1c34a authored by Roland McGrath's avatar Roland McGrath
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x86_64 syscall audit fast-path



This adds a fast path for 64-bit syscall entry and exit when
TIF_SYSCALL_AUDIT is set, but no other kind of syscall tracing.
This path 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: default avatarRoland McGrath <roland@redhat.com>
parent 15e8f348
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