aboutsummaryrefslogtreecommitdiffstats
path: root/fs/xfs/linux-2.6/xfs_buf.c
diff options
context:
space:
mode:
authorDave Chinner <dchinner@redhat.com>2010-09-22 10:47:20 +1000
committerAlex Elder <aelder@sgi.com>2010-10-18 15:07:48 -0500
commitebad861b5702c3e2332a3e906978f47144d22f70 (patch)
tree7b4502277c46d26d1d26258d05596b58ab6b868a /fs/xfs/linux-2.6/xfs_buf.c
parent5adc94c247c3779782c7b0b8b5e28cf50596eb37 (diff)
downloadkernel_samsung_espresso10-ebad861b5702c3e2332a3e906978f47144d22f70.zip
kernel_samsung_espresso10-ebad861b5702c3e2332a3e906978f47144d22f70.tar.gz
kernel_samsung_espresso10-ebad861b5702c3e2332a3e906978f47144d22f70.tar.bz2
xfs: store xfs_mount in the buftarg instead of in the xfs_buf
Each buffer contains both a buftarg pointer and a mount pointer. If we add a mount pointer into the buftarg, we can avoid needing the b_mount field in every buffer and grab it from the buftarg when needed instead. This shrinks the xfs_buf by 8 bytes. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_buf.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 22c7bff..d692897 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -894,7 +894,7 @@ xfs_buf_lock(
trace_xfs_buf_lock(bp, _RET_IP_);
if (atomic_read(&bp->b_pin_count) && (bp->b_flags & XBF_STALE))
- xfs_log_force(bp->b_mount, 0);
+ xfs_log_force(bp->b_target->bt_mount, 0);
if (atomic_read(&bp->b_io_remaining))
blk_run_address_space(bp->b_target->bt_mapping);
down(&bp->b_sema);
@@ -1017,7 +1017,6 @@ xfs_bwrite(
{
int error;
- bp->b_mount = mp;
bp->b_flags |= XBF_WRITE;
bp->b_flags &= ~(XBF_ASYNC | XBF_READ);
@@ -1038,8 +1037,6 @@ xfs_bdwrite(
{
trace_xfs_buf_bdwrite(bp, _RET_IP_);
- bp->b_mount = mp;
-
bp->b_flags &= ~XBF_READ;
bp->b_flags |= (XBF_DELWRI | XBF_ASYNC);
@@ -1128,7 +1125,7 @@ int
xfs_bdstrat_cb(
struct xfs_buf *bp)
{
- if (XFS_FORCED_SHUTDOWN(bp->b_mount)) {
+ if (XFS_FORCED_SHUTDOWN(bp->b_target->bt_mount)) {
trace_xfs_bdstrat_shut(bp, _RET_IP_);
/*
* Metadata write that didn't get logged but
@@ -1644,6 +1641,7 @@ out_error:
xfs_buftarg_t *
xfs_alloc_buftarg(
+ struct xfs_mount *mp,
struct block_device *bdev,
int external,
const char *fsname)
@@ -1652,6 +1650,7 @@ xfs_alloc_buftarg(
btp = kmem_zalloc(sizeof(*btp), KM_SLEEP);
+ btp->bt_mount = mp;
btp->bt_dev = bdev->bd_dev;
btp->bt_bdev = bdev;
if (xfs_setsize_buftarg_early(btp, bdev))