| Message ID | 20180709140539.GA17517@embeddedor.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Mon, Jul 09, 2018 at 09:05:39AM -0500, Gustavo A. R. Silva wrote: > 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> > --- > fs/xfs/xfs_bmap_util.c | 13 ++----------- > 1 file changed, 2 insertions(+), 11 deletions(-) > > diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c > index 83b1e8c..4b0b16f 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 Why not use swap() on the di_nextents and di_format exchange below here too? > @@ -1987,14 +1982,10 @@ 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; > + swap(ip->i_cnextents, tip->i_cnextents); > > cowfp = ip->i_cowfp; > ip->i_cowfp = tip->i_cowfp; Same here -- why not use swap on {ip,tip}->i_cowfp? --D > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Darrick, On 07/09/2018 11:39 AM, Darrick J. Wong wrote: > On Mon, Jul 09, 2018 at 09:05:39AM -0500, Gustavo A. R. Silva wrote: >> 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> >> --- >> fs/xfs/xfs_bmap_util.c | 13 ++----------- >> 1 file changed, 2 insertions(+), 11 deletions(-) >> >> diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c >> index 83b1e8c..4b0b16f 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 > > Why not use swap() on the di_nextents and di_format exchange below here > too? > >> @@ -1987,14 +1982,10 @@ 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; >> + swap(ip->i_cnextents, tip->i_cnextents); >> >> cowfp = ip->i_cowfp; >> ip->i_cowfp = tip->i_cowfp; > > Same here -- why not use swap on {ip,tip}->i_cowfp? > Yep. I'll send a new patch shortly. Thanks for the feedback. -- Gustavo -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 83b1e8c..4b0b16f 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 @@ -1987,14 +1982,10 @@ 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; + swap(ip->i_cnextents, tip->i_cnextents); cowfp = ip->i_cowfp; ip->i_cowfp = tip->i_cowfp;
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> --- fs/xfs/xfs_bmap_util.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-)