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Subject[PATCH 07/11] ocfs2: Less function calls in ocfs2_shutdown_local_alloc() after error detection
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 4 Jul 2015 21:02:05 +0200

The functions kfree() and iput() were called in a few cases by the
ocfs2_shutdown_local_alloc() function during error handling even
if the passed variables contained still a null pointer.

* Return directly if the local allocation feature is unused or if a call
for the ocfs2_get_system_file_inode() function failed.

* Adjust jump targets.

* Drop unnecessary initialisations for the variables "alloc", "alloc_copy",
"bh", "local_alloc_inode" and "main_bm_inode" then.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
fs/ocfs2/localalloc.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 16579ed..e6d5074 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -377,18 +377,18 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
{
int status;
handle_t *handle;
- struct inode *local_alloc_inode = NULL;
- struct buffer_head *bh = NULL;
+ struct inode *local_alloc_inode;
+ struct buffer_head *bh;
struct buffer_head *main_bm_bh = NULL;
- struct inode *main_bm_inode = NULL;
- struct ocfs2_dinode *alloc_copy = NULL;
- struct ocfs2_dinode *alloc = NULL;
+ struct inode *main_bm_inode;
+ struct ocfs2_dinode *alloc_copy;
+ struct ocfs2_dinode *alloc;

cancel_delayed_work(&osb->la_enable_wq);
flush_workqueue(ocfs2_wq);

if (osb->local_alloc_state == OCFS2_LA_UNUSED)
- goto out;
+ return;

local_alloc_inode =
ocfs2_get_system_file_inode(osb,
@@ -397,7 +397,7 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
if (!local_alloc_inode) {
status = -ENOENT;
mlog_errno(status);
- goto out;
+ return;
}

osb->local_alloc_state = OCFS2_LA_DISABLED;
@@ -410,7 +410,7 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
if (!main_bm_inode) {
status = -EINVAL;
mlog_errno(status);
- goto out;
+ goto put_local_alloc_inode;
}

mutex_lock(&main_bm_inode->i_mutex);
@@ -443,7 +443,7 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
bh, OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
- goto out_commit;
+ goto free_copy;
}

ocfs2_clear_local_alloc(alloc);
@@ -458,21 +458,18 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
if (status < 0)
mlog_errno(status);

+free_copy:
+ kfree(alloc_copy);
out_commit:
ocfs2_commit_trans(osb, handle);
-
out_unlock:
brelse(main_bm_bh);
-
ocfs2_inode_unlock(main_bm_inode, 1);
-
out_mutex:
mutex_unlock(&main_bm_inode->i_mutex);
iput(main_bm_inode);
-
-out:
+put_local_alloc_inode:
iput(local_alloc_inode);
- kfree(alloc_copy);
}

/*
--
2.4.5


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