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Commit 530cd330 authored by David Härdeman's avatar David Härdeman Committed by Linus Torvalds
Browse files

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



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: default avatarDavid Härdeman <david@hardeman.nu>
Acked-by: default avatarStefani Seibold <stefani@seibold.net>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a3a2e76c

include/linux/kfifo.h

+2 −1
Original line number Diff line number Diff line
@@ -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