Fabian Frederick
2014-Dec-22 19:05 UTC
[Ocfs2-devel] [PATCH 1/1 linux-next] ocfs2: remove unnecessary sizeof(char)
sizeof(char) is always 1.
Suggested-by: Joe Perches <joe at perches.com>
Signed-off-by: Fabian Frederick <fabf at skynet.be>
---
fs/ocfs2/journal.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index e238bbc..750597c 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -129,8 +129,8 @@ int ocfs2_compute_replay_slots(struct ocfs2_super *osb)
if (osb->replay_map)
return 0;
- replay_map = kzalloc(sizeof(struct ocfs2_replay_map) +
- (osb->max_slots * sizeof(char)), GFP_KERNEL);
+ replay_map = kzalloc(sizeof(struct ocfs2_replay_map) + osb->max_slots,
+ GFP_KERNEL);
if (!replay_map) {
mlog_errno(-ENOMEM);
--
1.9.1
Andrew Morton
2014-Dec-22 21:35 UTC
[Ocfs2-devel] [PATCH 1/1 linux-next] ocfs2: remove unnecessary sizeof(char)
On Mon, 22 Dec 2014 20:05:09 +0100 Fabian Frederick <fabf at skynet.be> wrote:> sizeof(char) is always 1. > > ... > > --- a/fs/ocfs2/journal.c > +++ b/fs/ocfs2/journal.c > @@ -129,8 +129,8 @@ int ocfs2_compute_replay_slots(struct ocfs2_super *osb) > if (osb->replay_map) > return 0; > > - replay_map = kzalloc(sizeof(struct ocfs2_replay_map) + > - (osb->max_slots * sizeof(char)), GFP_KERNEL); > + replay_map = kzalloc(sizeof(struct ocfs2_replay_map) + osb->max_slots, > + GFP_KERNEL); > > if (!replay_map) { > mlog_errno(-ENOMEM);I dunno. The code at present isn't particularly idiomatic, but it has some documentation value and says "I know what I'm doing". It would be better if it was kzalloc(sizeof(struct ocfs2_replay_map) * sizeof(struct ocfs2_replay_map.rm_replay_slots[0]), ...); And it would be better if C permitted that ;) kzalloc(sizeof(struct ocfs2_replay_map) * sizeof((struct ocfs2_replay_map *)0)->rm_replay_slots[0]), ...); yuk.