From e878167af92fda03eb3a8597eec24128d4d47c43 Mon Sep 17 00:00:00 2001 From: ZhangZhen Date: Wed, 26 Feb 2014 10:32:41 +0800 Subject: ext2/3: use prandom_u32() instead of get_random_bytes() Many of the uses of get_random_bytes() do not actually need cryptographically secure random numbers. Replace those uses with a call to prandom_u32(), which is faster and which doesn't consume entropy from the /dev/random driver. The commit dd1f723bf56bd96efc9d90e9e60dc511c79de48f has made that for ext4, and i did the same for ext2/3. Signed-off-by: Zhang Zhen Signed-off-by: Jan Kara --- fs/ext2/ialloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/ext2/ialloc.c') diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c index 7cadd823bb31..7d66fb0e4cca 100644 --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -284,7 +284,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent) int best_ndir = inodes_per_group; int best_group = -1; - get_random_bytes(&group, sizeof(group)); + group = prandom_u32(); parent_group = (unsigned)group % ngroups; for (i = 0; i < ngroups; i++) { group = (parent_group + i) % ngroups; -- cgit v1.2.3-70-g09d2