[XFS] Remove m_nreadaheads

m_nreadaheads in the mount struct is never used; remove it and the various
macros assigned to it. Also remove a couple other unused macros in the
same areas.

Removes one user of xfs_physmem.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29322a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index a66b39805176..4458e706b1c6 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -871,16 +871,6 @@ xfs_mountfs(
                 writeio_log = mp->m_writeio_log;
         }
 
-        /*
-         * Set the number of readahead buffers to use based on
-         * physical memory size.
-         */
-        if (xfs_physmem <= 4096)                /* <= 16MB */
-                mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB;
-        else if (xfs_physmem <= 8192)   /* <= 32MB */
-                mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB;
-        else
-                mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32;
         if (sbp->sb_blocklog > readio_log) {
                 mp->m_readio_log = sbp->sb_blocklog;
         } else {