Ocfs2 devel - Feb 2013 - [PATCH 1/2 linux-next] ocfs2: remove kfree() redundant null checks

smatch analysis:

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()

Cc: Mark Fasheh <mfasheh at suse.com>
Cc: Joel Becker <jlbec at evilplan.org>
Cc: ocfs2-devel at oss.oracle.com
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
---
 fs/ocfs2/alloc.c |   10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 31b9463..42c0e49 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -6134,11 +6134,8 @@ bail:
 		iput(tl_inode);
 	brelse(tl_bh);
 
-	if (status < 0 && (*tl_copy)) {
-		kfree(*tl_copy);
-		*tl_copy = NULL;
-		mlog_errno(status);
-	}
+	kfree(*tl_copy);
+	*tl_copy = NULL;
 
 	return status;
 }
@@ -6751,8 +6748,7 @@ int ocfs2_zero_range_for_truncate(struct inode *inode,
handle_t *handle,
 		mlog_errno(ret);
 
 out:
-	if (pages)
-		kfree(pages);
+	kfree(pages);
 
 	return ret;
 }
-- 
1.7.9.5

Cc: Mark Fasheh <mfasheh at suse.com>
Cc: Joel Becker <jlbec at evilplan.org>
Cc: ocfs2-devel at oss.oracle.com
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
---
 fs/ocfs2/alloc.c |   12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 42c0e49..1689ca1 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -6090,10 +6090,8 @@ int ocfs2_begin_truncate_log_recovery(struct ocfs2_super
*osb,
 	trace_ocfs2_begin_truncate_log_recovery(slot_num);
 
 	status = ocfs2_get_truncate_log_info(osb, slot_num, &tl_inode,
&tl_bh);
-	if (status < 0) {
-		mlog_errno(status);
+	if (status < 0)
 		goto bail;
-	}
 
 	di = (struct ocfs2_dinode *) tl_bh->b_data;
 
@@ -6109,7 +6107,6 @@ int ocfs2_begin_truncate_log_recovery(struct ocfs2_super
*osb,
 		*tl_copy = kmalloc(tl_bh->b_size, GFP_KERNEL);
 		if (!(*tl_copy)) {
 			status = -ENOMEM;
-			mlog_errno(status);
 			goto bail;
 		}
 
@@ -6123,10 +6120,8 @@ int ocfs2_begin_truncate_log_recovery(struct ocfs2_super
*osb,
 
 		ocfs2_compute_meta_ecc(osb->sb, tl_bh->b_data, &di->i_check);
 		status = ocfs2_write_block(osb, tl_bh, INODE_CACHE(tl_inode));
-		if (status < 0) {
-			mlog_errno(status);
+		if (status < 0)
 			goto bail;
-		}
 	}
 
 bail:
@@ -6134,6 +6129,9 @@ bail:
 		iput(tl_inode);
 	brelse(tl_bh);
 
+	if (status < 0)
+		mlog_errno(status);
+
 	kfree(*tl_copy);
 	*tl_copy = NULL;
 
-- 
1.7.9.5

On 02/13/2013 12:44 PM, Tim Gardner wrote:
> fs/ocfs2/alloc.c:6138 ocfs2_begin_truncate_log_recovery() info:
>  redundant null check on *tl_copy calling kfree()
Ignore this series. I'll resend.

rtg
-- 
Tim Gardner tim.gardner at canonical.com