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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-26 03:10:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-26 03:10:58 +0200 |
| commit | 3dd2ee4824b668a635d6d2bb6bc73f33708cab9f (patch) | |
| tree | 40d8d017d9631ecefae76eb09e1bbecc23e17452 /fs/dcache.c | |
| parent | Merge branch 'dcache-cleanup' (diff) | |
| download | linux-3dd2ee4824b668a635d6d2bb6bc73f33708cab9f.tar.xz linux-3dd2ee4824b668a635d6d2bb6bc73f33708cab9f.zip | |
bit_spinlock: don't play preemption games inside the busy loop
When we are waiting for the bit-lock to be released, and are looping
over the 'cpu_relax()' should not be doing anything else - otherwise we
miss the point of trying to do the whole 'cpu_relax()'.
Do the preemption enable/disable around the loop, rather than inside of
it.
Noticed when I was looking at the code generation for the dcache
__d_drop usage, and the code just looked very odd.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dcache.c')
0 files changed, 0 insertions, 0 deletions