kfifo: implement missing __kfifo_skip_r()

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>
git-mirror · Aug 20, 2010 · b35de43 · b35de43
1 parent c81476d
commit b35de43
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diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
@@ -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 void __kfifo_skip_r(struct __kfifo *fifo, size_t recsize);
+
 extern unsigned int __kfifo_out_peek_r(struct __kfifo *fifo,
 	void *buf, unsigned int len, size_t recsize);
 

diff --git a/kernel/kfifo.c b/kernel/kfifo.c
@@ -503,6 +503,15 @@ unsigned int __kfifo_out_r(struct __kfifo *fifo, void *buf,
 }
 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,
 	unsigned long len, unsigned int *copied, size_t recsize)
 {