From 56e77d3ebe0daf7f06df79ddd3117ea0b9cb13d2 Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Wed, 20 Feb 2013 13:13:47 +1100 Subject: [PATCH] ocfs2: remove kfree() redundant null checks smatch analysis indicates a number of redundant NULL checks before calling kfree(), e.g., 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.... Signed-off-by: Tim Gardner Cc: Mark Fasheh Acked-by: Joel Becker Signed-off-by: Andrew Morton --- fs/ocfs2/alloc.c | 5 ++--- fs/ocfs2/cluster/heartbeat.c | 6 ++---- fs/ocfs2/cluster/tcp.c | 6 ++---- fs/ocfs2/dlm/dlmdomain.c | 4 +--- fs/ocfs2/extent_map.c | 3 +-- fs/ocfs2/journal.c | 10 +++------- fs/ocfs2/localalloc.c | 8 +++----- fs/ocfs2/stack_o2cb.c | 2 +- fs/ocfs2/super.c | 6 ++---- fs/ocfs2/sysfile.c | 3 +-- 10 files changed, 18 insertions(+), 35 deletions(-) diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index 31b9463fba1f..83a1a1d9d1bf 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -6134,7 +6134,7 @@ bail: iput(tl_inode); brelse(tl_bh); - if (status < 0 && (*tl_copy)) { + if (status < 0) { kfree(*tl_copy); *tl_copy = NULL; mlog_errno(status); @@ -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; } diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index ff753bbe296c..8c3318bf2252 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -1449,8 +1449,7 @@ 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++) { @@ -1464,8 +1463,7 @@ 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); diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index a1d83c58b296..0d2bf566e39a 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -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; } diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 9e89d70df337..dbb17c07656a 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -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); } diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index f487aa343442..1c39efb71bab 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -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, diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index 2dd36af79e26..8eccfabcd12e 100644 --- a/fs/ocfs2/journal.c +++ b/fs/ocfs2/journal.c @@ -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 diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c index a9f78c74d687..aebeacd807c3 100644 --- a/fs/ocfs2/localalloc.c +++ b/fs/ocfs2/localalloc.c @@ -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); diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c index 94368017edb3..bf1f8930456f 100644 --- a/fs/ocfs2/stack_o2cb.c +++ b/fs/ocfs2/stack_o2cb.c @@ -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: diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 0e91ec22a940..9b6910dec4ba 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -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)); diff --git a/fs/ocfs2/sysfile.c b/fs/ocfs2/sysfile.c index 3d635f4bbb20..f053688d22a3 100644 --- a/fs/ocfs2/sysfile.c +++ b/fs/ocfs2/sysfile.c @@ -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) + -- 2.39.5