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| author | Andrea Arcangeli <andrea@cpushare.com> | 2007-07-15 23:41:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:50 -0700 |
| commit | cf99abace7e07dd8491e7093a9a9ef11d48838ed (patch) | |
| tree | 3b7cfd7c76c2c43e6ae3fdaaff3a50a752072424 /kernel/seccomp.c | |
| parent | 1d9d02feeee89e9132034d504c9a45eeaf618a3d (diff) | |
| download | lwn-cf99abace7e07dd8491e7093a9a9ef11d48838ed.tar.gz lwn-cf99abace7e07dd8491e7093a9a9ef11d48838ed.zip | |
make seccomp zerocost in schedule
This follows a suggestion from Chuck Ebbert on how to make seccomp
absolutely zerocost in schedule too. The only remaining footprint of
seccomp is in terms of the bzImage size that becomes a few bytes (perhaps
even a few kbytes) larger, measure it if you care in the embedded.
Signed-off-by: Andrea Arcangeli <andrea@cpushare.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/seccomp.c')
| -rw-r--r-- | kernel/seccomp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c index 1dfa8a509726..ad64fcb731f2 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -74,6 +74,9 @@ long prctl_set_seccomp(unsigned long seccomp_mode) if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) { current->seccomp.mode = seccomp_mode; set_thread_flag(TIF_SECCOMP); +#ifdef TIF_NOTSC + disable_TSC(); +#endif ret = 0; } |