is_power_of_2: kernel/kfifo.c

Replace (n & (n-1)) with is_power_of_2() Signed-off-by: vignesh babu <[email protected]> Acked-by: Stelian Pop <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Jul 16, 2007 · f84d5a7 · f84d5a7
1 parent cf99aba
commit f84d5a7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/kfifo.h>
+#include <linux/log2.h>
 
 /**
  * kfifo_init - allocates a new FIFO using a preallocated buffer
@@ -41,7 +42,7 @@ struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
 	struct kfifo *fifo;
 
 	/* size must be a power of 2 */
-	BUG_ON(size & (size - 1));
+	BUG_ON(!is_power_of_2(size));
 
 	fifo = kmalloc(sizeof(struct kfifo), gfp_mask);
 	if (!fifo)