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| author | Shen Feng <shen@cn.fujitsu.com> | 2008-07-11 19:27:31 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-07-11 19:27:31 -0400 |
| commit | 74767c5a2dca0a60676d60d36377a41f60ca42ba (patch) | |
| tree | 96f7fa96682be3eb3b3f04c373260762d6a901aa | |
| parent | fdf6c7a7683c6272e953a33358920e98a4d93cf0 (diff) | |
| download | linux-74767c5a2dca0a60676d60d36377a41f60ca42ba.tar.gz linux-74767c5a2dca0a60676d60d36377a41f60ca42ba.tar.bz2 linux-74767c5a2dca0a60676d60d36377a41f60ca42ba.zip | |
ext4: miscellaneous error checks and coding cleanups for mballoc
ext4_mb_seq_history_open(): check if sbi->s_mb_history is NULL
ext4_mb_history_init(): replace kmalloc and memset with kzalloc
ext4_mb_init_backend(): remove memset since kzalloc is used
ext4_mb_init(): the return value of ext4_mb_init_backend is int,
but i is unsigned, replace it with a new int variable.
Signed-off-by: Shen Feng <shen@cn.fujitsu.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/mballoc.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index b64600be2066..6d69dd92aadb 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -1985,6 +1985,8 @@ static int ext4_mb_seq_history_open(struct inode *inode, struct file *file) int rc; int size; + if (unlikely(sbi->s_mb_history == NULL)) + return -ENOMEM; s = kmalloc(sizeof(*s), GFP_KERNEL); if (s == NULL) return -ENOMEM; @@ -2187,9 +2189,7 @@ static void ext4_mb_history_init(struct super_block *sb) sbi->s_mb_history_cur = 0; spin_lock_init(&sbi->s_mb_history_lock); i = sbi->s_mb_history_max * sizeof(struct ext4_mb_history); - sbi->s_mb_history = kmalloc(i, GFP_KERNEL); - if (likely(sbi->s_mb_history != NULL)) - memset(sbi->s_mb_history, 0, i); + sbi->s_mb_history = kzalloc(i, GFP_KERNEL); /* if we can't allocate history, then we simple won't use it */ } @@ -2303,7 +2303,6 @@ static int ext4_mb_init_backend(struct super_block *sb) i++; goto err_freebuddy; } - memset(meta_group_info[j], 0, len); set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(meta_group_info[j]->bb_state)); @@ -2358,6 +2357,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) unsigned i; unsigned offset; unsigned max; + int ret; if (!test_opt(sb, MBALLOC)) return 0; @@ -2392,12 +2392,12 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) } while (i <= sb->s_blocksize_bits + 1); /* init file for buddy data */ - i = ext4_mb_init_backend(sb); - if (i) { + ret = ext4_mb_init_backend(sb); + if (ret != 0) { clear_opt(sbi->s_mount_opt, MBALLOC); kfree(sbi->s_mb_offsets); kfree(sbi->s_mb_maxs); - return i; + return ret; } spin_lock_init(&sbi->s_md_lock); |