The patch titled
kfifo: use void * pointers for user buffers
has been added to the -mm tree. Its filename is
kfifo-use-void-pointers-for-user-buffers.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kfifo: use void * pointers for user buffers
From: Andi Kleen <andi@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Cc: Stefani Seibold <stefani@xxxxxxxxxxx>
Cc: Roland Dreier <rdreier@xxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Andy Walls <awalls@xxxxxxxxx>
Cc: Vikram Dhillon <dhillonv10@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kfifo.h | 10 +++++-----
kernel/kfifo.c | 8 ++++----
2 files changed, 9 insertions(+), 9 deletions(-)
diff -puN include/linux/kfifo.h~kfifo-use-void-pointers-for-user-buffers include/linux/kfifo.h
--- a/include/linux/kfifo.h~kfifo-use-void-pointers-for-user-buffers
+++ a/include/linux/kfifo.h
@@ -104,15 +104,15 @@ 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
@@ -194,7 +194,7 @@ 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;
@@ -219,7 +219,7 @@ 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;
diff -puN kernel/kfifo.c~kfifo-use-void-pointers-for-user-buffers kernel/kfifo.c
--- a/kernel/kfifo.c~kfifo-use-void-pointers-for-user-buffers
+++ a/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);
_
Patches currently in -mm which might be from andi@xxxxxxxxxxxxxx are
origin.patch
kernel-signalc-fix-kernel-information-leak-with-print-fatal-signals=1.patch
kfifo-use-void-pointers-for-user-buffers.patch
kfifo-make-kfifo_in-atomic.patch
kfifo-sanitize-_user-error-handling.patch
kfifo-add-kfifo_out_peek.patch
kfifo-add-kfifo_initialized.patch
kfifo-document-everywhere-that-size-has-to-be-power-of-two.patch
hardware-latency-detector-remove-default-m.patch
kbuild-move-fno-dwarf2-cfi-asm-to-powerpc-only.patch
mm-introduce-dump_page-and-print-symbolic-flag-names.patch
tracehooks-kill-some-pt_ptraced-checks.patch
tracehooks-check-pt_ptraced-before-reporting-the-single-step.patch
ptrace_signal-check-pt_ptraced-before-reporting-a-signal.patch
export-__ptrace_detach-and-do_notify_parent_cldstop.patch
reorder-the-code-in-kernel-ptracec.patch
implement-utrace-ptrace.patch
utrace-core.patch
--
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