Commit 530cd330 authored Apr 06, 2010 by David Härdeman Committed by Linus Torvalds Apr 07, 2010

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: 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>

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

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