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authorEric Sandeen <sandeen@sandeen.net>2007-11-23 00:29:42 -0500
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-02-07 02:16:43 -0500
commit71ddabb94a623d1e16e7e66898bf439ff78ecc41 (patch)
treeded37e51148312db71e6a68b18c8bfca49b95112 /fs/xfs/xfs_rw.h
parenta67d7c5f5d25d0b13a4dfb182697135b014fa478 (diff)
[XFS] optimize XFS_IS_REALTIME_INODE w/o realtime config
Use XFS_IS_REALTIME_INODE in more places, and #define it to 0 if CONFIG_XFS_RT is off. This should be safe because mount checks in xfs_rtmount_init: so if we get mounted w/o CONFIG_XFS_RT, no realtime inodes should be encountered after that. Defining XFS_IS_REALTIME_INODE to 0 saves a bit of stack space, presumeably gcc can optimize around the various "if (0)" type checks: xfs_alloc_file_space -8 xfs_bmap_adjacent -16 xfs_bmapi -8 xfs_bmap_rtalloc -16 xfs_bunmapi -28 xfs_free_file_space -64 xfs_imap +8 <-- ? hmm. xfs_iomap_write_direct -12 xfs_qm_dqusage_adjust -4 xfs_qm_vop_chown_reserve -4 SGI-PV: 971186 SGI-Modid: xfs-linux-melb:xfs-kern:30014a Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_rw.h')
-rw-r--r--fs/xfs/xfs_rw.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index bcfe07aa7e6b..f87db5344ce6 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -32,7 +32,7 @@ struct xfs_mount;
32static inline xfs_daddr_t 32static inline xfs_daddr_t
33xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb) 33xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
34{ 34{
35 return (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \ 35 return (XFS_IS_REALTIME_INODE(ip) ? \
36 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \ 36 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
37 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb))); 37 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
38} 38}
@@ -53,7 +53,7 @@ xfs_get_extsz_hint(
53{ 53{
54 xfs_extlen_t extsz; 54 xfs_extlen_t extsz;
55 55
56 if (unlikely(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { 56 if (unlikely(XFS_IS_REALTIME_INODE(ip))) {
57 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) 57 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
58 ? ip->i_d.di_extsize 58 ? ip->i_d.di_extsize
59 : ip->i_mount->m_sb.sb_rextsize; 59 : ip->i_mount->m_sb.sb_rextsize;