[XFS] Remove the xfs_refcache

Remove the xfs_refcache, it was only needed while we were still
building for 2.4 kernels.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30472a

Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

5 files changed, 2 insertions, 62 deletions

diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 3ca39c4e5d2a..e5143323e71f 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -99,7 +99,6 @@
 /*
  * Feature macros (disable/enable)
  */
-#undef  HAVE_REFCACHE   /* reference cache not needed for NFS in 2.6 */
 #define HAVE_SPLICE     /* a splice(2) exists in 2.6, but not in 2.4 */
 #ifdef CONFIG_SMP
 #define HAVE_PERCPU_SB  /* per cpu superblock counters are a 2.6 feature */
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index bfcd72cbaeea..eaa01895ff93 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -240,10 +240,6 @@ typedef struct xfs_inode {
         atomic_t                i_pincount;     /* inode pin count */
         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
         spinlock_t              i_flags_lock;   /* inode i_flags lock */
-#ifdef HAVE_REFCACHE
-        struct xfs_inode        **i_refcache;   /* ptr to entry in ref cache */
-        struct xfs_inode        *i_release;     /* inode to unref */
-#endif
         /* Miscellaneous state. */
         unsigned short          i_flags;        /* see defined flags below */
         unsigned char           i_update_core;  /* timestamps/size is dirty */
diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c
index 7eb157a59f9e..1c6d40ed6816 100644
--- a/fs/xfs/xfs_rename.c
+++ b/fs/xfs/xfs_rename.c
@@ -36,7 +36,6 @@
 #include "xfs_bmap.h"
 #include "xfs_error.h"
 #include "xfs_quota.h"
-#include "xfs_refcache.h"
 #include "xfs_utils.h"
 #include "xfs_trans_space.h"
 #include "xfs_vnodeops.h"
@@ -580,10 +579,8 @@ xfs_rename(
          * the vnode references.
          */
         error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
-        if (target_ip != NULL) {
-                xfs_refcache_purge_ip(target_ip);
+        if (target_ip != NULL)
                 IRELE(target_ip);
-        }
         /*
          * Let interposed file systems know about removed links.
          */
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 7094caff13cf..79bdfb3d6081 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -43,7 +43,6 @@
 #include "xfs_error.h"
 #include "xfs_bmap.h"
 #include "xfs_rw.h"
-#include "xfs_refcache.h"
 #include "xfs_buf_item.h"
 #include "xfs_log_priv.h"
 #include "xfs_dir2_trace.h"
@@ -157,7 +156,6 @@ xfs_cleanup(void)
 
         xfs_cleanup_procfs();
         xfs_sysctl_unregister();
-        xfs_refcache_destroy();
         xfs_filestream_uninit();
         xfs_mru_cache_uninit();
         xfs_acl_zone_destroy(xfs_acl_zone);
@@ -584,11 +582,6 @@ xfs_unmount(
                                         0 : DM_FLAGS_UNWANTED;
         }
 #endif
-        /*
-         * First blow any referenced inode from this file system
-         * out of the reference cache, and delete the timer.
-         */
-        xfs_refcache_purge_mp(mp);
 
         /*
          * Blow away any referenced inode in the filestreams cache.
@@ -652,7 +645,6 @@ xfs_quiesce_fs(
 {
         int                     count = 0, pincount;
 
-        xfs_refcache_purge_mp(mp);
         xfs_flush_buftarg(mp->m_ddev_targp, 0);
         xfs_finish_reclaim_all(mp, 0);
 
@@ -1323,18 +1315,6 @@ xfs_syncsub(
         }
 
         /*
-         * If this is the periodic sync, then kick some entries out of
-         * the reference cache.  This ensures that idle entries are
-         * eventually kicked out of the cache.
-         */
-        if (flags & SYNC_REFCACHE) {
-                if (flags & SYNC_WAIT)
-                        xfs_refcache_purge_mp(mp);
-                else
-                        xfs_refcache_purge_some(mp);
-        }
-
-        /*
          * If asked, update the disk superblock with incore counter values if we
          * are using non-persistent counters so that they don't get too far out
          * of sync if we crash or get a forced shutdown. We don't want to force
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index ce82a2d0acbe..35ac59dabf8b 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -48,7 +48,6 @@
 #include "xfs_quota.h"
 #include "xfs_utils.h"
 #include "xfs_rtalloc.h"
-#include "xfs_refcache.h"
 #include "xfs_trans_space.h"
 #include "xfs_log_priv.h"
 #include "xfs_filestream.h"
@@ -1520,12 +1519,6 @@ xfs_release(
                         xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE);
         }
 
-#ifdef HAVE_REFCACHE
-        /* If we are in the NFS reference cache then don't do this now */
-        if (ip->i_refcache)
-                return 0;
-#endif
-
         if (ip->i_d.di_nlink != 0) {
                 if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) &&
                      ((ip->i_size > 0) || (VN_CACHED(vp) > 0 ||
@@ -2449,14 +2442,6 @@ xfs_remove(
         }
 
         /*
-         * Before we drop our extra reference to the inode, purge it
-         * from the refcache if it is there.  By waiting until afterwards
-         * to do the IRELE, we ensure that we won't go inactive in the
-         * xfs_refcache_purge_ip routine (although that would be OK).
-         */
-        xfs_refcache_purge_ip(ip);
-
-        /*
          * If we are using filestreams, kill the stream association.
          * If the file is still open it may get a new one but that
          * will get killed on last close in xfs_close() so we don't
@@ -2495,14 +2480,6 @@ xfs_remove(
         cancel_flags |= XFS_TRANS_ABORT;
         xfs_trans_cancel(tp, cancel_flags);
 
-        /*
-         * Before we drop our extra reference to the inode, purge it
-         * from the refcache if it is there.  By waiting until afterwards
-         * to do the IRELE, we ensure that we won't go inactive in the
-         * xfs_refcache_purge_ip routine (although that would be OK).
-         */
-        xfs_refcache_purge_ip(ip);
-
         IRELE(ip);
 
         goto std_return;
@@ -3460,16 +3437,7 @@ xfs_rwunlock(
 {
         if (S_ISDIR(ip->i_d.di_mode))
                 return;
-        if (locktype == VRWLOCK_WRITE) {
-                /*
-                 * In the write case, we may have added a new entry to
-                 * the reference cache.  This might store a pointer to
-                 * an inode to be released in this inode.  If it is there,
-                 * clear the pointer and release the inode after unlocking
-                 * this one.
-                 */
-                xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL);
-        } else {
+        if (locktype != VRWLOCK_WRITE) {
                 ASSERT((locktype == VRWLOCK_READ) ||
                        (locktype == VRWLOCK_WRITE_DIRECT));
                 xfs_iunlock(ip, XFS_IOLOCK_SHARED);