[KJ] [PATCH]is_power_of_2-decnet/dn_route.c

[KJ] [PATCH]is_power_of_2-decnet/dn_route.c

[vignesh babu]

Replacing (n & (n-1)) in the context of power of 2 checks
with is_power_of_2

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
--- 
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index a8bf106..0a67706 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -76,6 +76,7 @@
 #include <linux/netfilter_decnet.h>
 #include <linux/rcupdate.h>
 #include <linux/times.h>
+#include <linux/log2.h>
 #include <asm/errno.h>
 #include <net/netlink.h>
 #include <net/neighbour.h>
@@ -1792,7 +1793,7 @@ void __init dn_route_init(void)
 	do {
 		dn_rt_hash_mask = (1UL << order) * PAGE_SIZE /
 			sizeof(struct dn_rt_hash_bucket);
-		while(dn_rt_hash_mask & (dn_rt_hash_mask - 1))
+		while(!is_power_of_2(dn_rt_hash_mask))
 			dn_rt_hash_mask--;
 		dn_rt_hash_table = (struct dn_rt_hash_bucket *)
 			__get_free_pages(GFP_ATOMIC, order);

-- 
Vignesh Babu BM 
_____________________________________________________________ 
"Why is it that every time I'm with you, makes me believe in magic?"

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