From f7c439504ccba0cca43271e651013ab97a221c62 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Fri, 24 Apr 2009 23:31:59 -0400 Subject: [PATCH] ext4: Use is_power_of_2() for clarity Signed-off-by: Robert P. J. Day Signed-off-by: "Theodore Ts'o" --- fs/ext4/super.c | 5 ++--- 1 file 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;