[IA64] is_power_of_2-ia64/mm/hugetlbpage.c

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>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index 1346b7f..d22861c 100644 (file)
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -15,6 +15,7 @@
 #include <linux/pagemap.h>
 #include <linux/slab.h>
 #include <linux/sysctl.h>
+#include <linux/log2.h>
 #include <asm/mman.h>
 #include <asm/pgalloc.h>
 #include <asm/tlb.h>
@@ -182,7 +183,7 @@ static int __init hugetlb_setup_sz(char *str)
                tr_pages = 0x15557000UL;
 
        size = memparse(str, &str);
-       if (*str || (size & (size-1)) || !(tr_pages & size) ||
+       if (*str || !is_power_of_2(size) || !(tr_pages & size) ||
                size <= PAGE_SIZE ||
                size >= (1UL << PAGE_SHIFT << MAX_ORDER)) {
                printk(KERN_WARNING "Invalid huge page size specified\n");