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include/linux/kfifo.h: fix INIT_KFIFO()

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DECLARE_KFIFO creates a union with a struct kfifo and a buffer array with
size [size + sizeof(struct kfifo)].

INIT_KFIFO then sets the buffer pointer in struct kfifo to point to the
beginning of the buffer array which means that the first call to kfifo_in
will overwrite members of the struct kfifo.

Signed-off-by: David Härdeman <david@hardeman.nu>
Acked-by: Stefani Seibold <stefani@seibold.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Härdeman 2010-04-06 14:34:43 -07:00 committed by Linus Torvalds
parent a3a2e76c77
commit 530cd330dc
1 changed files with 2 additions and 1 deletions
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include/linux/kfifo.h
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@ -86,7 +86,8 @@ union { \
*/
#define INIT_KFIFO(name) \
name = __kfifo_initializer(sizeof(name##kfifo_buffer) - \
sizeof(struct kfifo), name##kfifo_buffer)
sizeof(struct kfifo), \
name##kfifo_buffer + sizeof(struct kfifo))
/**
* DEFINE_KFIFO - macro to define and initialize a kfifo