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kfifo: implement missing __kfifo_skip_r()

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kfifo_skip() is currently broken, due to the missing of the internal
helper function.  Add it.

Signed-off-by: Andrea Righi <arighi@develer.com>
Cc: Greg KH <greg@kroah.com>
Acked-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:
Andrea Righi 2010-08-19 14:13:27 -07:00 committed by Linus Torvalds
parent c81476df1b
commit b35de43b31
2 changed files with 11 additions and 0 deletions
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2
include/linux/kfifo.h
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@ -836,6 +836,8 @@ extern void __kfifo_dma_out_finish_r(struct __kfifo *fifo, size_t recsize);
extern unsigned int __kfifo_len_r(struct __kfifo *fifo, size_t recsize); extern unsigned int __kfifo_len_r(struct __kfifo *fifo, size_t recsize);
extern void __kfifo_skip_r(struct __kfifo *fifo, size_t recsize);
extern unsigned int __kfifo_out_peek_r(struct __kfifo *fifo, extern unsigned int __kfifo_out_peek_r(struct __kfifo *fifo,
void *buf, unsigned int len, size_t recsize); void *buf, unsigned int len, size_t recsize);

9
kernel/kfifo.c
View File

@ -503,6 +503,15 @@ unsigned int __kfifo_out_r(struct __kfifo *fifo, void *buf,
} }
EXPORT_SYMBOL(__kfifo_out_r); EXPORT_SYMBOL(__kfifo_out_r);
void __kfifo_skip_r(struct __kfifo *fifo, size_t recsize)
{
unsigned int n;
n = __kfifo_peek_n(fifo, recsize);
fifo->out += n + recsize;
}
EXPORT_SYMBOL(__kfifo_skip_r);
int __kfifo_from_user_r(struct __kfifo *fifo, const void __user *from, int __kfifo_from_user_r(struct __kfifo *fifo, const void __user *from,
unsigned long len, unsigned int *copied, size_t recsize) unsigned long len, unsigned int *copied, size_t recsize)
{ {