CVS log for xfs-linux/xfs_rw.h

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Default branch: MAIN
Current tag: HEAD

Revision 1.86 / (download) - annotate - [select for diffs], Mon Nov 5 15:04:07 2007 UTC (9 years, 11 months ago) by dgc.longdrop.melbourne.sgi.com
Branch: MAIN
CVS Tags: HEAD
Changes since 1.85: +2 -2 lines
Diff to previous 1.85 (unified)

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:

# define xfs_rtmount_init(m)    (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))

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

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Merge of xfs-linux-melb:xfs-kern:30014a by kenmcd.

  Use XFS_IS_REALTIME_INODE() rather than open coding the check.

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