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>
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 311f875..4aa95f2 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -836,6 +836,8 @@
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
index 4502604..6b5580c 100644
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -503,6 +503,15 @@
}
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)
{
