diff mbox

btrfs: memset cur_trans->delayed_refs to zero

Message ID 20150907142437.GA21090@gmail.com (mailing list archive)
State Accepted
Headers show

Commit Message

Alexandru Moise Sept. 7, 2015, 2:24 p.m. UTC
Use memset() to null out the btrfs_delayed_ref_root of
btrfs_transaction instead of setting all the members to 0 by hand.

Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
---
Rather than setting each member of ->delayed_refs by hand we should
adhere to the practice of using memset() calls to fill those memory
locations with zeroes. We make an exception however for the rb_root
and atomic_t variable to make room for change in future delayed_refs
implementations.

 fs/btrfs/transaction.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

Comments

David Sterba Sept. 22, 2015, 1:04 p.m. UTC | #1
On Mon, Sep 07, 2015 at 05:24:37PM +0300, Alexandru Moise wrote:
> Use memset() to null out the btrfs_delayed_ref_root of
> btrfs_transaction instead of setting all the members to 0 by hand.
> 
> Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>

Reviewed-by: David Sterba <dsterba@suse.com>

Please use the versioning in patch subject so we know which version is
the latest, like

[PATCH v4] btrfs: memset cur_trans->delayed_refs to zero
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Alexandru Moise Sept. 22, 2015, 1:19 p.m. UTC | #2
On Tue, Sep 22, 2015 at 03:04:54PM +0200, David Sterba wrote:
> On Mon, Sep 07, 2015 at 05:24:37PM +0300, Alexandru Moise wrote:
> > Use memset() to null out the btrfs_delayed_ref_root of
> > btrfs_transaction instead of setting all the members to 0 by hand.
> > 
> > Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
> 
> Reviewed-by: David Sterba <dsterba@suse.com>
> 
> Please use the versioning in patch subject so we know which version is
> the latest, like
> 
> [PATCH v4] btrfs: memset cur_trans->delayed_refs to zero

Alright, do you want me to resend it with the different subject tag
or shall I just keep that in mind for future patches?
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David Sterba Sept. 22, 2015, 1:24 p.m. UTC | #3
On Tue, Sep 22, 2015 at 04:19:36PM +0300, Alexandru Moise wrote:
> Alright, do you want me to resend it with the different subject tag
> or shall I just keep that in mind for future patches?

No need to resend.
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diff mbox

Patch

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 8f259b3..e4f7dcb 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -224,15 +224,11 @@  loop:
 	cur_trans->start_time = get_seconds();
 	cur_trans->dirty_bg_run = 0;
 
+	memset(&cur_trans->delayed_refs, 0, sizeof(cur_trans->delayed_refs));
+
 	cur_trans->delayed_refs.href_root = RB_ROOT;
 	cur_trans->delayed_refs.dirty_extent_root = RB_ROOT;
 	atomic_set(&cur_trans->delayed_refs.num_entries, 0);
-	cur_trans->delayed_refs.num_heads_ready = 0;
-	cur_trans->delayed_refs.pending_csums = 0;
-	cur_trans->delayed_refs.num_heads = 0;
-	cur_trans->delayed_refs.flushing = 0;
-	cur_trans->delayed_refs.run_delayed_start = 0;
-	cur_trans->delayed_refs.qgroup_to_skip = 0;
 
 	/*
 	 * although the tree mod log is per file system and not per transaction,