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| author | Stefani Seibold <stefani@seibold.net> | 2013-02-27 17:05:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:23 -0800 |
| commit | dfe2a77fd243ac3bf204fd0624e4d0b2134aaa6d (patch) | |
| tree | 8ec9dd36b30a4cb53138dec2b07bc4a4c79fa49e /lib | |
| parent | c759b35e6469fe7519e9fe45d5285d49f12cb657 (diff) | |
| download | lwn-dfe2a77fd243ac3bf204fd0624e4d0b2134aaa6d.tar.gz lwn-dfe2a77fd243ac3bf204fd0624e4d0b2134aaa6d.zip | |
kfifo: fix kfifo_alloc() and kfifo_init()
Fix kfifo_alloc() and kfifo_init() to alloc at least the requested number
of elements. Since the kfifo operates on power of 2 the request size will
be rounded up to the next power of two.
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/kfifo.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/lib/kfifo.c b/lib/kfifo.c index 59dcf5b81d24..7b7f83027b7b 100644 --- a/lib/kfifo.c +++ b/lib/kfifo.c @@ -42,8 +42,7 @@ int __kfifo_alloc(struct __kfifo *fifo, unsigned int size, * round down to the next power of 2, since our 'let the indices * wrap' technique works only in this case. */ - if (!is_power_of_2(size)) - size = rounddown_pow_of_two(size); + size = roundup_pow_of_two(size); fifo->in = 0; fifo->out = 0; @@ -83,8 +82,7 @@ int __kfifo_init(struct __kfifo *fifo, void *buffer, { size /= esize; - if (!is_power_of_2(size)) - size = rounddown_pow_of_two(size); + size = roundup_pow_of_two(size); fifo->in = 0; fifo->out = 0; |