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authorChristoph Hellwig <hch@infradead.org>2008-08-13 16:13:45 +1000
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-08-13 16:13:45 +1000
commit907f49a8f552acc5d75635e86d567f05daf5c0d8 (patch)
treea6c835cf6b5be39111c0107039e8123e273339a2
parent0b1f917730dc2276fadbd9813ac3666abd7b1cbd (diff)
downloadop-kernel-dev-907f49a8f552acc5d75635e86d567f05daf5c0d8.zip
op-kernel-dev-907f49a8f552acc5d75635e86d567f05daf5c0d8.tar.gz
[XFS] implement IHOLD/IRELE directly
Now that all direct calls to VN_HOLD/VN_RELE are gone we can implement IHOLD/IRELE directly. For the IHOLD case also replace igrab with a direct increment of i_count because we are guaranteed to already have a live and referenced inode by the VFS. Also remove the vn_hold statistic because it's been rather meaningless for some time with most references done by other callers. SGI-PV: 981498 SGI-Modid: xfs-linux-melb:xfs-kern:31764a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
-rw-r--r--fs/xfs/linux-2.6/xfs_vnode.c18
-rw-r--r--fs/xfs/linux-2.6/xfs_vnode.h28
-rw-r--r--fs/xfs/xfs_utils.h3
3 files changed, 12 insertions, 37 deletions
diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c
index 4af972b..1c5a34f 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.c
+++ b/fs/xfs/linux-2.6/xfs_vnode.c
@@ -82,24 +82,6 @@ vn_ioerror(
xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l);
}
-
-/*
- * Add a reference to a referenced vnode.
- */
-bhv_vnode_t *
-vn_hold(
- bhv_vnode_t *vp)
-{
- struct inode *inode;
-
- XFS_STATS_INC(vn_hold);
-
- inode = igrab(vp);
- ASSERT(inode);
-
- return vp;
-}
-
#ifdef XFS_INODE_TRACE
/*
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index cc53687..0d7eac0 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -69,22 +69,18 @@ static inline int vn_count(bhv_vnode_t *vp)
return atomic_read(&vp->i_count);
}
-/*
- * Vnode reference counting functions (and macros for compatibility).
- */
-extern bhv_vnode_t *vn_hold(bhv_vnode_t *);
-
-#if defined(XFS_INODE_TRACE)
-#define VN_HOLD(vp) \
- ((void)vn_hold(vp), \
- xfs_itrace_hold(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address))
-#define VN_RELE(vp) \
- (xfs_itrace_rele(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address), \
- iput(vp))
-#else
-#define VN_HOLD(vp) ((void)vn_hold(vp))
-#define VN_RELE(vp) (iput(vp))
-#endif
+#define IHOLD(ip) \
+do { \
+ ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
+ atomic_inc(&(VFS_I(ip)->i_count)); \
+ xfs_itrace_hold((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
+} while (0)
+
+#define IRELE(ip) \
+do { \
+ xfs_itrace_rele((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
+ iput(VFS_I(ip)); \
+} while (0)
static inline bhv_vnode_t *vn_grab(bhv_vnode_t *vp)
{
diff --git a/fs/xfs/xfs_utils.h b/fs/xfs/xfs_utils.h
index 7b533df..ef32122 100644
--- a/fs/xfs/xfs_utils.h
+++ b/fs/xfs/xfs_utils.h
@@ -18,9 +18,6 @@
#ifndef __XFS_UTILS_H__
#define __XFS_UTILS_H__
-#define IRELE(ip) VN_RELE(VFS_I(ip))
-#define IHOLD(ip) VN_HOLD(VFS_I(ip))
-
extern int xfs_truncate_file(xfs_mount_t *, xfs_inode_t *);
extern int xfs_dir_ialloc(xfs_trans_t **, xfs_inode_t *, mode_t, xfs_nlink_t,
xfs_dev_t, cred_t *, prid_t, int,
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