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authorTheodore Ts'o <tytso@mit.edu>2013-11-08 00:14:53 -0500
committerTheodore Ts'o <tytso@mit.edu>2013-11-08 00:14:53 -0500
commitdd1f723bf56bd96efc9d90e9e60dc511c79de48f (patch)
tree3860500165c69c225ccd5121f2ffde93dfbf4f02 /fs/ext4/ialloc.c
parentf2754114400afe38ad5ade3b588451c4f36a61af (diff)
ext4: 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. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ialloc.c')
-rw-r--r--fs/ext4/ialloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 137193ff389b..0ee59a6644e2 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -432,7 +432,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
ext4fs_dirhash(qstr->name, qstr->len, &hinfo);
grp = hinfo.hash;
} else
- get_random_bytes(&grp, sizeof(grp));
+ grp = prandom_u32();
parent_group = (unsigned)grp % ngroups;
for (i = 0; i < ngroups; i++) {
g = (parent_group + i) % ngroups;