Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [1/6] kfifo: Use void * pointers for user buffers | Date | Sun, 27 Dec 2009 22:03:11 +0100 (CET) |
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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>
--- include/linux/kfifo.h | 10 +++++----- kernel/kfifo.c | 8 ++++---- 2 files changed, 9 insertions(+), 9 deletions(-)
Index: linux/include/linux/kfifo.h =================================================================== --- linux.orig/include/linux/kfifo.h +++ linux/include/linux/kfifo.h @@ -105,15 +105,15 @@ union { \ #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 @@ -195,7 +195,7 @@ static inline __must_check unsigned int * 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; @@ -220,7 +220,7 @@ static inline unsigned int kfifo_in_lock * @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; Index: linux/kernel/kfifo.c =================================================================== --- linux.orig/kernel/kfifo.c +++ linux/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 @@ static void _kfifo_init(struct kfifo *fi * @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 @@ EXPORT_SYMBOL(__kfifo_in_n); * 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 @@ EXPORT_SYMBOL(__kfifo_out_n); * 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);
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