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authorAndrea Arcangeli <andrea@cpushare.com>2007-07-15 23:41:33 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:50 -0700
commitcf99abace7e07dd8491e7093a9a9ef11d48838ed (patch)
tree3b7cfd7c76c2c43e6ae3fdaaff3a50a752072424 /kernel/seccomp.c
parent1d9d02feeee89e9132034d504c9a45eeaf618a3d (diff)
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.c3
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;
}

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