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ocfs2: remove kfree() redundant null checks 

smatch analysis indicates a number of redundant NULL checks before
calling kfree(), eg:

  fs/ocfs2/alloc.c:6138 ocfs2_begin_truncate_log_recovery() info:
   redundant null check on *tl_copy calling kfree()

  fs/ocfs2/alloc.c:6755 ocfs2_zero_range_for_truncate() info:
   redundant null check on pages calling kfree()

etc....

[akpm@linux-foundation.org: revert dubious change in ocfs2_begin_truncate_log_recovery()]
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tim Gardner 2013-02-21 16:42:44 -08:00 committed by Linus Torvalds
parent 49deb4bc22
commit d787ab0977
10 changed files with 17 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/ocfs2/alloc.c
View File

@ -6751,8 +6751,7 @@ int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
mlog_errno(ret);
out:
if (pages)
kfree(pages);
kfree(pages);
return ret;
}

6
fs/ocfs2/cluster/heartbeat.c
View File

@ -1471,8 +1471,7 @@ static void o2hb_region_release(struct config_item *item)
mlog(ML_HEARTBEAT, "hb region release (%s)\n", reg->hr_dev_name);
if (reg->hr_tmp_block)
kfree(reg->hr_tmp_block);
kfree(reg->hr_tmp_block);
if (reg->hr_slot_data) {
for (i = 0; i < reg->hr_num_pages; i++) {
@ -1486,8 +1485,7 @@ static void o2hb_region_release(struct config_item *item)
if (reg->hr_bdev)
blkdev_put(reg->hr_bdev, FMODE_READ|FMODE_WRITE);
if (reg->hr_slots)
kfree(reg->hr_slots);
kfree(reg->hr_slots);
kfree(reg->hr_db_regnum);
kfree(reg->hr_db_livenodes);

6
fs/ocfs2/cluster/tcp.c
View File

@ -1165,10 +1165,8 @@ out:
o2net_debug_del_nst(&nst); /* must be before dropping sc and node */
if (sc)
sc_put(sc);
if (vec)
kfree(vec);
if (msg)
kfree(msg);
kfree(vec);
kfree(msg);
o2net_complete_nsw(nn, &nsw, 0, 0, 0);
return ret;
}

4
fs/ocfs2/dlm/dlmdomain.c
View File

@ -319,9 +319,7 @@ static void dlm_free_ctxt_mem(struct dlm_ctxt *dlm)
if (dlm->master_hash)
dlm_free_pagevec((void **)dlm->master_hash, DLM_HASH_PAGES);
if (dlm->name)
kfree(dlm->name);
kfree(dlm->name);
kfree(dlm);
}

3
fs/ocfs2/extent_map.c
View File

@ -282,8 +282,7 @@ search:
spin_unlock(&oi->ip_lock);
out:
if (new_emi)
kfree(new_emi);
kfree(new_emi);
}
static int ocfs2_last_eb_is_empty(struct inode *inode,

10
fs/ocfs2/journal.c
View File

@ -1234,11 +1234,8 @@ static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal,
/* Though we wish to avoid it, we are in fact safe in
* skipping local alloc cleanup as fsck.ocfs2 is more
* than capable of reclaiming unused space. */
if (la_dinode)
kfree(la_dinode);
if (tl_dinode)
kfree(tl_dinode);
kfree(la_dinode);
kfree(tl_dinode);
if (qrec)
ocfs2_free_quota_recovery(qrec);
@ -1408,8 +1405,7 @@ bail:
mutex_unlock(&osb->recovery_lock);
if (rm_quota)
kfree(rm_quota);
kfree(rm_quota);
/* no one is callint kthread_stop() for us so the kthread() api
* requires that we call do_exit(). And it isn't exported, but

8
fs/ocfs2/localalloc.c
View File

@ -476,8 +476,7 @@ out:
if (local_alloc_inode)
iput(local_alloc_inode);
if (alloc_copy)
kfree(alloc_copy);
kfree(alloc_copy);
}
/*
@ -534,7 +533,7 @@ int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb,
mlog_errno(status);
bail:
if ((status < 0) && (*alloc_copy)) {
if (status < 0) {
kfree(*alloc_copy);
*alloc_copy = NULL;
}
@ -1290,8 +1289,7 @@ bail:
if (main_bm_inode)
iput(main_bm_inode);
if (alloc_copy)
kfree(alloc_copy);
kfree(alloc_copy);
if (ac)
ocfs2_free_alloc_context(ac);

2
fs/ocfs2/stack_o2cb.c
View File

@ -376,7 +376,7 @@ static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
dlm_register_eviction_cb(dlm, &priv->op_eviction_cb);
out_free:
if (rc && conn->cc_private)
if (rc)
kfree(conn->cc_private);
out:

6
fs/ocfs2/super.c
View File

@ -2525,8 +2525,7 @@ static int ocfs2_check_volume(struct ocfs2_super *osb)
mlog_errno(status);
finally:
if (local_alloc)
kfree(local_alloc);
kfree(local_alloc);
if (status)
mlog_errno(status);
@ -2553,8 +2552,7 @@ static void ocfs2_delete_osb(struct ocfs2_super *osb)
* we free it here.
*/
kfree(osb->journal);
if (osb->local_alloc_copy)
kfree(osb->local_alloc_copy);
kfree(osb->local_alloc_copy);
kfree(osb->uuid_str);
ocfs2_put_dlm_debug(osb->osb_dlm_debug);
memset(osb, 0, sizeof(struct ocfs2_super));

3
fs/ocfs2/sysfile.c
View File

@ -91,8 +91,7 @@ static struct inode **get_local_system_inode(struct ocfs2_super *osb,
} else
osb->local_system_inodes = local_system_inodes;
spin_unlock(&osb->osb_lock);
if (unlikely(free))
kfree(free);
kfree(free);
}
index = (slot * NUM_LOCAL_SYSTEM_INODES) +