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| author | Stefani Seibold <stefani@seibold.net> | 2010-01-15 17:01:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-01-16 12:15:37 -0800 |
| commit | 7e105057a34c83cea542dacc55ff0528bce67afa (patch) | |
| tree | 2603ae4ef6b310d8a26f779761cff8cfb4815c09 /include/linux/kfifo.h | |
| parent | 33f724eb9e3d6e33aad410318d3ac720fecbdbcd (diff) | |
| download | linux-7e105057a34c83cea542dacc55ff0528bce67afa.tar.gz linux-7e105057a34c83cea542dacc55ff0528bce67afa.tar.bz2 linux-7e105057a34c83cea542dacc55ff0528bce67afa.zip | |
kfifo: fix kfifo_out_locked race bug
Fix a wrong optimization in include/linux/kfifo.h which could cause a race
in kfifo_out_locked.
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Reported-by: Johan Hovold <jhovold@gmail.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kfifo.h')
| -rw-r--r-- | include/linux/kfifo.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h index 7c6b32a1421c..c4ac88b3c302 100644 --- a/include/linux/kfifo.h +++ b/include/linux/kfifo.h @@ -228,13 +228,6 @@ static inline __must_check unsigned int kfifo_out_locked(struct kfifo *fifo, ret = kfifo_out(fifo, to, n); - /* - * optimization: if the FIFO is empty, set the indices to 0 - * so we don't wrap the next time - */ - if (kfifo_is_empty(fifo)) - kfifo_reset(fifo); - spin_unlock_irqrestore(lock, flags); return ret; |