From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH v2] xfs_bmap_util: use swap macro
Date: Mon, 9 Jul 2018 16:02:59 -0500 [thread overview]
Message-ID: <20180709210259.GA18992@embeddedor.com> (raw)
Make use of the swap macro and remove some unnecessary variables.
This makes the code easier to read and maintain. Also, reduces the
stack usage.
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
Changes in v2
- Use swap in a couple more of places.
fs/xfs/xfs_bmap_util.c | 28 +++++-----------------------
1 file changed, 5 insertions(+), 23 deletions(-)
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 83b1e8c..a657d0a 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1691,7 +1691,6 @@ xfs_swap_extent_forks(
int *src_log_flags,
int *target_log_flags)
{
- struct xfs_ifork tempifp, *ifp, *tifp;
xfs_filblks_t aforkblks = 0;
xfs_filblks_t taforkblks = 0;
xfs_extnum_t junk;
@@ -1733,11 +1732,7 @@ xfs_swap_extent_forks(
/*
* Swap the data forks of the inodes
*/
- ifp = &ip->i_df;
- tifp = &tip->i_df;
- tempifp = *ifp; /* struct copy */
- *ifp = *tifp; /* struct copy */
- *tifp = tempifp; /* struct copy */
+ swap(ip->i_df, tip->i_df);
/*
* Fix the on-disk inode values
@@ -1746,13 +1741,8 @@ xfs_swap_extent_forks(
ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks;
tip->i_d.di_nblocks = tmp + taforkblks - aforkblks;
- tmp = (uint64_t) ip->i_d.di_nextents;
- ip->i_d.di_nextents = tip->i_d.di_nextents;
- tip->i_d.di_nextents = tmp;
-
- tmp = (uint64_t) ip->i_d.di_format;
- ip->i_d.di_format = tip->i_d.di_format;
- tip->i_d.di_format = tmp;
+ swap(ip->i_d.di_nextents, tip->i_d.di_nextents);
+ swap(ip->i_d.di_format, tip->i_d.di_format);
/*
* The extents in the source inode could still contain speculative
@@ -1846,7 +1836,6 @@ xfs_swap_extents(
int src_log_flags, target_log_flags;
int error = 0;
int lock_flags;
- struct xfs_ifork *cowfp;
uint64_t f;
int resblks = 0;
@@ -1987,18 +1976,11 @@ xfs_swap_extents(
/* Swap the cow forks. */
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
- xfs_extnum_t extnum;
-
ASSERT(ip->i_cformat == XFS_DINODE_FMT_EXTENTS);
ASSERT(tip->i_cformat == XFS_DINODE_FMT_EXTENTS);
- extnum = ip->i_cnextents;
- ip->i_cnextents = tip->i_cnextents;
- tip->i_cnextents = extnum;
-
- cowfp = ip->i_cowfp;
- ip->i_cowfp = tip->i_cowfp;
- tip->i_cowfp = cowfp;
+ swap(ip->i_cnextents, tip->i_cnextents);
+ swap(ip->i_cowfp, tip->i_cowfp);
if (ip->i_cowfp && ip->i_cowfp->if_bytes)
xfs_inode_set_cowblocks_tag(ip);
--
2.7.4
next reply other threads:[~2018-07-09 21:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-09 21:02 Gustavo A. R. Silva [this message]
2018-07-11 17:44 ` [PATCH v2] xfs_bmap_util: use swap macro Darrick J. Wong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180709210259.GA18992@embeddedor.com \
--to=gustavo@embeddedor.com \
--cc=darrick.wong@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).