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[XFS] Simplify pagebuf_rele Remove a conditional that can not be true 

anymore and simplify the final put path a little

SGI-PV: 908809
SGI-Modid: xfs-linux:xfs-kern:200790a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Christoph Hellwig 2005-11-02 15:09:35 +11:00 committed by Nathan Scott
parent e718eeb4fe
commit 7f14d0a013
1 changed files with 4 additions and 25 deletions
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29
fs/xfs/linux-2.6/xfs_buf.c
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@ -830,39 +830,18 @@ pagebuf_rele(
PB_TRACE(pb, "rele", pb->pb_relse);
/*
* pagebuf_lookup buffers are not hashed, not delayed write,
* and don't have their own release routines. Special case.
*/
if (unlikely(!hash)) {
ASSERT(!pb->pb_relse);
if (atomic_dec_and_test(&pb->pb_hold))
xfs_buf_free(pb);
return;
}
if (atomic_dec_and_lock(&pb->pb_hold, &hash->bh_lock)) {
int do_free = 1;
if (pb->pb_relse) {
atomic_inc(&pb->pb_hold);
spin_unlock(&hash->bh_lock);
(*(pb->pb_relse)) (pb);
spin_lock(&hash->bh_lock);
do_free = 0;
}
if (pb->pb_flags & PBF_FS_MANAGED) {
do_free = 0;
}
if (do_free) {
ASSERT((pb->pb_flags & (PBF_DELWRI|_PBF_DELWRI_Q)) == 0);
} else if (pb->pb_flags & PBF_FS_MANAGED) {
spin_unlock(&hash->bh_lock);
} else {
ASSERT(!(pb->pb_flags & (PBF_DELWRI|_PBF_DELWRI_Q)));
list_del_init(&pb->pb_hash_list);
spin_unlock(&hash->bh_lock);
pagebuf_free(pb);
} else {
spin_unlock(&hash->bh_lock);
}
} else {
/*