kfifo: use void * pointers for user buffers
The pointers to user buffers are currently unsigned char *, which requires
a lot of casting in the caller for any non-char typed buffers. Use void *
instead.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Stefani Seibold <stefani@seibold.net>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Andy Walls <awalls@radix.net>
Cc: Vikram Dhillon <dhillonv10@gmail.com>
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 c4ac88b..6fb495e 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -104,15 +104,15 @@
#undef __kfifo_initializer
-extern void kfifo_init(struct kfifo *fifo, unsigned char *buffer,
+extern void kfifo_init(struct kfifo *fifo, void *buffer,
unsigned int size);
extern __must_check int kfifo_alloc(struct kfifo *fifo, unsigned int size,
gfp_t gfp_mask);
extern void kfifo_free(struct kfifo *fifo);
extern unsigned int kfifo_in(struct kfifo *fifo,
- const unsigned char *from, unsigned int len);
+ const void *from, unsigned int len);
extern __must_check unsigned int kfifo_out(struct kfifo *fifo,
- unsigned char *to, unsigned int len);
+ void *to, unsigned int len);
/**
* kfifo_reset - removes the entire FIFO contents
@@ -194,7 +194,7 @@
* bytes copied.
*/
static inline unsigned int kfifo_in_locked(struct kfifo *fifo,
- const unsigned char *from, unsigned int n, spinlock_t *lock)
+ const void *from, unsigned int n, spinlock_t *lock)
{
unsigned long flags;
unsigned int ret;
@@ -219,7 +219,7 @@
* @to buffer and returns the number of copied bytes.
*/
static inline __must_check unsigned int kfifo_out_locked(struct kfifo *fifo,
- unsigned char *to, unsigned int n, spinlock_t *lock)
+ void *to, unsigned int n, spinlock_t *lock)
{
unsigned long flags;
unsigned int ret;
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
index e92d519..ab615e6 100644
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -28,7 +28,7 @@
#include <linux/log2.h>
#include <linux/uaccess.h>
-static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
+static void _kfifo_init(struct kfifo *fifo, void *buffer,
unsigned int size)
{
fifo->buffer = buffer;
@@ -44,7 +44,7 @@
* @size: the size of the internal buffer, this have to be a power of 2.
*
*/
-void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size)
+void kfifo_init(struct kfifo *fifo, void *buffer, unsigned int size)
{
/* size must be a power of 2 */
BUG_ON(!is_power_of_2(size));
@@ -235,7 +235,7 @@
* Note that with only one concurrent reader and one concurrent
* writer, you don't need extra locking to use these functions.
*/
-unsigned int kfifo_in(struct kfifo *fifo, const unsigned char *from,
+unsigned int kfifo_in(struct kfifo *fifo, const void *from,
unsigned int len)
{
len = min(kfifo_avail(fifo), len);
@@ -277,7 +277,7 @@
* Note that with only one concurrent reader and one concurrent
* writer, you don't need extra locking to use these functions.
*/
-unsigned int kfifo_out(struct kfifo *fifo, unsigned char *to, unsigned int len)
+unsigned int kfifo_out(struct kfifo *fifo, void *to, unsigned int len)
{
len = min(kfifo_len(fifo), len);
