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kfifo: fix warn_unused_result

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Fix the "ignoring return value of '...', declared with attribute
warn_unused_result" compiler warning in several users of the new kfifo
API.

It removes the __must_check attribute from kfifo_in() and
kfifo_in_locked() which must not necessary performed.

Fix the allocation bug in the nozomi driver file, by moving out the
kfifo_alloc from the interrupt handler into the probe function.

Fix the kfifo_out() and kfifo_out_locked() users to handle a unexpected
end of fifo.

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>
This commit is contained in:
Stefani Seibold 2009-12-21 14:37:29 -08:00 • committed by Linus Torvalds
parent 7acd72eb85
commit 9842c38e91
7 changed files with 51 additions and 16 deletions
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4
include/linux/kfifo.h
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@ -56,7 +56,7 @@ extern void kfifo_init(struct kfifo *fifo, unsigned char *buffer,
extern __must_check int kfifo_alloc(struct kfifo *fifo, unsigned int size,
gfp_t gfp_mask);
extern void kfifo_free(struct kfifo *fifo);
extern __must_check unsigned int kfifo_in(struct kfifo *fifo,
extern unsigned int kfifo_in(struct kfifo *fifo,
const unsigned char *from, unsigned int len);
extern __must_check unsigned int kfifo_out(struct kfifo *fifo,
unsigned char *to, unsigned int len);
@ -94,7 +94,7 @@ static inline unsigned int kfifo_len(struct kfifo *fifo)
* the FIFO depending on the free space, and returns the number of
* bytes copied.
*/
static inline __must_check unsigned int kfifo_in_locked(struct kfifo *fifo,
static inline unsigned int kfifo_in_locked(struct kfifo *fifo,
const unsigned char *from, unsigned int n, spinlock_t *lock)
{
unsigned long flags;