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>
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@ -104,15 +104,15 @@ union { \
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#undef __kfifo_initializer
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extern void kfifo_init(struct kfifo *fifo, unsigned char *buffer,
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extern void kfifo_init(struct kfifo *fifo, void *buffer,
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unsigned int size);
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extern __must_check int kfifo_alloc(struct kfifo *fifo, unsigned int size,
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gfp_t gfp_mask);
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extern void kfifo_free(struct kfifo *fifo);
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extern unsigned int kfifo_in(struct kfifo *fifo,
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const unsigned char *from, unsigned int len);
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const void *from, unsigned int len);
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extern __must_check unsigned int kfifo_out(struct kfifo *fifo,
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unsigned char *to, unsigned int len);
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void *to, unsigned int len);
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/**
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* kfifo_reset - removes the entire FIFO contents
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@ -194,7 +194,7 @@ static inline __must_check unsigned int kfifo_avail(struct kfifo *fifo)
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* bytes copied.
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*/
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static inline unsigned int kfifo_in_locked(struct kfifo *fifo,
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const unsigned char *from, unsigned int n, spinlock_t *lock)
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const void *from, unsigned int n, spinlock_t *lock)
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{
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unsigned long flags;
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unsigned int ret;
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@ -219,7 +219,7 @@ static inline unsigned int kfifo_in_locked(struct kfifo *fifo,
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* @to buffer and returns the number of copied bytes.
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*/
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static inline __must_check unsigned int kfifo_out_locked(struct kfifo *fifo,
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unsigned char *to, unsigned int n, spinlock_t *lock)
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void *to, unsigned int n, spinlock_t *lock)
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{
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unsigned long flags;
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unsigned int ret;
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@ -28,7 +28,7 @@
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#include <linux/log2.h>
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#include <linux/uaccess.h>
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static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
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static void _kfifo_init(struct kfifo *fifo, void *buffer,
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unsigned int size)
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{
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fifo->buffer = buffer;
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@ -44,7 +44,7 @@ static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
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* @size: the size of the internal buffer, this have to be a power of 2.
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*
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*/
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void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size)
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void kfifo_init(struct kfifo *fifo, void *buffer, unsigned int size)
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{
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/* size must be a power of 2 */
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BUG_ON(!is_power_of_2(size));
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@ -235,7 +235,7 @@ EXPORT_SYMBOL(__kfifo_in_n);
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* Note that with only one concurrent reader and one concurrent
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* writer, you don't need extra locking to use these functions.
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*/
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unsigned int kfifo_in(struct kfifo *fifo, const unsigned char *from,
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unsigned int kfifo_in(struct kfifo *fifo, const void *from,
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unsigned int len)
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{
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len = min(kfifo_avail(fifo), len);
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@ -277,7 +277,7 @@ EXPORT_SYMBOL(__kfifo_out_n);
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* Note that with only one concurrent reader and one concurrent
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* writer, you don't need extra locking to use these functions.
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*/
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unsigned int kfifo_out(struct kfifo *fifo, unsigned char *to, unsigned int len)
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unsigned int kfifo_out(struct kfifo *fifo, void *to, unsigned int len)
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{
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len = min(kfifo_len(fifo), len);
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