kfifo: Don't use integer as NULL pointer

This patch fixes following sparse warnings:

include/linux/kfifo.h:127:25: warning: Using plain integer as NULL pointer
kernel/kfifo.c:83:21: warning: Using plain integer as NULL pointer

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 6f6c5f3..bc0fc79 100644 (file)
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -124,7 +124,7 @@ extern __must_check unsigned int kfifo_out_peek(struct kfifo *fifo,
  */
 static inline bool kfifo_initialized(struct kfifo *fifo)
 {
-       return fifo->buffer != 0;
+       return fifo->buffer != NULL;
 }
 
 /**

diff --git a/kernel/kfifo.c b/kernel/kfifo.c
index 559fb55..35edbe2 100644 (file)
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -80,7 +80,7 @@ int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask)
 
        buffer = kmalloc(size, gfp_mask);
        if (!buffer) {
-               _kfifo_init(fifo, 0, 0);
+               _kfifo_init(fifo, NULL, 0);
                return -ENOMEM;
        }