[XFS] Kill SYNC_CLOSE

SYNC_CLOSE is only ever used and checked in conjunction with SYNC_WAIT,
and this only done in one spot. The only thing this does is make
XFS_bflush() calls to the data buftargs.

This will happen very shortly afterwards the xfs_sync() call anyway in the
unmount path via the xfs_close_devices(), so this code is redundant and
can be removed. That only user of SYNC_CLOSE is now gone, so kill the flag
completely.

SGI-PV: 988140

SGI-Modid: xfs-linux-melb:xfs-kern:32310a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

3 files changed, 2 insertions, 40 deletions

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 376f32d92475..60ecf47b9f05 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1026,16 +1026,6 @@ xfs_fs_put_super(
         error = xfs_unmount_flush(mp, 0);
         WARN_ON(error);
 
-        /*
-         * If we're forcing a shutdown, typically because of a media error,
-         * we want to make sure we invalidate dirty pages that belong to
-         * referenced vnodes as well.
-         */
-        if (XFS_FORCED_SHUTDOWN(mp)) {
-                error = xfs_sync(mp, SYNC_WAIT | SYNC_CLOSE);
-                ASSERT(error != EFSCORRUPTED);
-        }
-
         if (mp->m_flags & XFS_MOUNT_DMAPI) {
                 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
                                 unmount_event_flags);
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 838070ce7249..91a54a79a09b 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -70,7 +70,7 @@ xfs_sync_inodes_ag(
         if (flags & SYNC_WAIT)
                 fflag = 0;              /* synchronous overrides all */
 
-        if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
+        if (flags & SYNC_DELWRI) {
                 /*
                  * We need the I/O lock if we're going to call any of
                  * the flush/inval routines.
@@ -117,7 +117,7 @@ xfs_sync_inodes_ag(
                 }
 
                 /* nothing to sync during shutdown */
-                if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
+                if (XFS_FORCED_SHUTDOWN(mp)) {
                         read_unlock(&pag->pag_ici_lock);
                         return 0;
                 }
@@ -152,20 +152,6 @@ xfs_sync_inodes_ag(
                  * If we need to drop the lock, insert a marker if we
                  * have not already done so.
                  */
-                if (flags & SYNC_CLOSE) {
-                        xfs_iunlock(ip, XFS_ILOCK_SHARED);
-                        if (XFS_FORCED_SHUTDOWN(mp))
-                                xfs_tosspages(ip, 0, -1, FI_REMAPF);
-                        else
-                                error = xfs_flushinval_pages(ip, 0, -1,
-                                                        FI_REMAPF);
-                        /* wait for I/O on freeze */
-                        if (flags & SYNC_IOWAIT)
-                                vn_iowait(ip);
-
-                        xfs_ilock(ip, XFS_ILOCK_SHARED);
-                }
-
                 if ((flags & SYNC_DELWRI) && VN_DIRTY(inode)) {
                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
                         error = xfs_flush_pages(ip, 0, -1, fflag, FI_NONE);
@@ -390,8 +376,6 @@ xfs_quiesce_data(
  *                     inodes.  SYNC_WAIT and SYNC_BDFLUSH are used to
  *                     determine if they should be flushed sync, async, or
  *                     delwri.
- *      SYNC_CLOSE   - This flag is passed when the system is being
- *                     unmounted.  We should sync and invalidate everything.
  *      SYNC_FSDATA  - This indicates that the caller would like to make
  *                     sure the superblock is safe on disk.  We can ensure
  *                     this by simply making sure the log gets flushed
@@ -472,17 +456,6 @@ xfs_sync(
                         return error;
         }
 
-        /*
-         * When shutting down, we need to insure that the AIL is pushed
-         * to disk or the filesystem can appear corrupt from the PROM.
-         */
-        if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
-                XFS_bflush(mp->m_ddev_targp);
-                if (mp->m_rtdev_targp) {
-                        XFS_bflush(mp->m_rtdev_targp);
-                }
-        }
-
         return XFS_ERROR(last_error);
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index fcd4040c9ad1..2509db021f79 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -28,7 +28,6 @@ typedef struct bhv_vfs_sync_work {
 } bhv_vfs_sync_work_t;
 
 #define SYNC_ATTR               0x0001  /* sync attributes */
-#define SYNC_CLOSE              0x0002  /* close file system down */
 #define SYNC_DELWRI             0x0004  /* look at delayed writes */
 #define SYNC_WAIT               0x0008  /* wait for i/o to complete */
 #define SYNC_BDFLUSH            0x0010  /* BDFLUSH is calling -- don't block */