ext4: Use is_power_of_2() for clarity

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 2 insertions, 3 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3f4475daa66d..3e509bc647e3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1483,7 +1483,7 @@ set_qf_format:
                                 return 0;
                         if (option < 0 || option > (1 << 30))
                                 return 0;
-                        if (option & (option - 1)) {
+                        if (!is_power_of_2(option)) {
                                 printk(KERN_ERR "EXT4-fs: inode_readahead_blks"
                                        " must be a power of 2\n");
                                 return 0;
@@ -2101,8 +2101,7 @@ static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
         if (parse_strtoul(buf, 0x40000000, &t))
                 return -EINVAL;
 
-        /* inode_readahead_blks must be a power of 2 */
-        if (t & (t-1))
+        if (!is_power_of_2(t))
                 return -EINVAL;
 
         sbi->s_inode_readahead_blks = t;