1 files changed, 0 insertions, 251 deletions

diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 069c5ceb9459..ea9a5fa49a48 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -453,254 +453,3 @@ out_error_or_again:
         return error;
 }
 
-/*
- * This is a wrapper routine around the xfs_ilock() routine
- * used to centralize some grungy code.  It is used in places
- * that wish to lock the inode solely for reading the extents.
- * The reason these places can't just call xfs_ilock(SHARED)
- * is that the inode lock also guards to bringing in of the
- * extents from disk for a file in b-tree format.  If the inode
- * is in b-tree format, then we need to lock the inode exclusively
- * until the extents are read in.  Locking it exclusively all
- * the time would limit our parallelism unnecessarily, though.
- * What we do instead is check to see if the extents have been
- * read in yet, and only lock the inode exclusively if they
- * have not.
- *
- * The function returns a value which should be given to the
- * corresponding xfs_iunlock_map_shared().  This value is
- * the mode in which the lock was actually taken.
- */
-uint
-xfs_ilock_map_shared(
-        xfs_inode_t     *ip)
-{
-        uint    lock_mode;
-
-        if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) &&
-            ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) {
-                lock_mode = XFS_ILOCK_EXCL;
-        } else {
-                lock_mode = XFS_ILOCK_SHARED;
-        }
-
-        xfs_ilock(ip, lock_mode);
-
-        return lock_mode;
-}
-
-/*
- * This is simply the unlock routine to go with xfs_ilock_map_shared().
- * All it does is call xfs_iunlock() with the given lock_mode.
- */
-void
-xfs_iunlock_map_shared(
-        xfs_inode_t     *ip,
-        unsigned int    lock_mode)
-{
-        xfs_iunlock(ip, lock_mode);
-}
-
-/*
- * The xfs inode contains 2 locks: a multi-reader lock called the
- * i_iolock and a multi-reader lock called the i_lock.  This routine
- * allows either or both of the locks to be obtained.
- *
- * The 2 locks should always be ordered so that the IO lock is
- * obtained first in order to prevent deadlock.
- *
- * ip -- the inode being locked
- * lock_flags -- this parameter indicates the inode's locks
- *       to be locked.  It can be:
- *              XFS_IOLOCK_SHARED,
- *              XFS_IOLOCK_EXCL,
- *              XFS_ILOCK_SHARED,
- *              XFS_ILOCK_EXCL,
- *              XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
- *              XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
- *              XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
- *              XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
- */
-void
-xfs_ilock(
-        xfs_inode_t             *ip,
-        uint                    lock_flags)
-{
-        /*
-         * You can't set both SHARED and EXCL for the same lock,
-         * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
-         * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
-         */
-        ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
-               (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
-        ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
-               (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
-        ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
-
-        if (lock_flags & XFS_IOLOCK_EXCL)
-                mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
-        else if (lock_flags & XFS_IOLOCK_SHARED)
-                mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
-
-        if (lock_flags & XFS_ILOCK_EXCL)
-                mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
-        else if (lock_flags & XFS_ILOCK_SHARED)
-                mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
-
-        trace_xfs_ilock(ip, lock_flags, _RET_IP_);
-}
-
-/*
- * This is just like xfs_ilock(), except that the caller
- * is guaranteed not to sleep.  It returns 1 if it gets
- * the requested locks and 0 otherwise.  If the IO lock is
- * obtained but the inode lock cannot be, then the IO lock
- * is dropped before returning.
- *
- * ip -- the inode being locked
- * lock_flags -- this parameter indicates the inode's locks to be
- *       to be locked.  See the comment for xfs_ilock() for a list
- *       of valid values.
- */
-int
-xfs_ilock_nowait(
-        xfs_inode_t             *ip,
-        uint                    lock_flags)
-{
-        /*
-         * You can't set both SHARED and EXCL for the same lock,
-         * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
-         * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
-         */
-        ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
-               (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
-        ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
-               (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
-        ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
-
-        if (lock_flags & XFS_IOLOCK_EXCL) {
-                if (!mrtryupdate(&ip->i_iolock))
-                        goto out;
-        } else if (lock_flags & XFS_IOLOCK_SHARED) {
-                if (!mrtryaccess(&ip->i_iolock))
-                        goto out;
-        }
-        if (lock_flags & XFS_ILOCK_EXCL) {
-                if (!mrtryupdate(&ip->i_lock))
-                        goto out_undo_iolock;
-        } else if (lock_flags & XFS_ILOCK_SHARED) {
-                if (!mrtryaccess(&ip->i_lock))
-                        goto out_undo_iolock;
-        }
-        trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_);
-        return 1;
-
- out_undo_iolock:
-        if (lock_flags & XFS_IOLOCK_EXCL)
-                mrunlock_excl(&ip->i_iolock);
-        else if (lock_flags & XFS_IOLOCK_SHARED)
-                mrunlock_shared(&ip->i_iolock);
- out:
-        return 0;
-}
-
-/*
- * xfs_iunlock() is used to drop the inode locks acquired with
- * xfs_ilock() and xfs_ilock_nowait().  The caller must pass
- * in the flags given to xfs_ilock() or xfs_ilock_nowait() so
- * that we know which locks to drop.
- *
- * ip -- the inode being unlocked
- * lock_flags -- this parameter indicates the inode's locks to be
- *       to be unlocked.  See the comment for xfs_ilock() for a list
- *       of valid values for this parameter.
- *
- */
-void
-xfs_iunlock(
-        xfs_inode_t             *ip,
-        uint                    lock_flags)
-{
-        /*
-         * You can't set both SHARED and EXCL for the same lock,
-         * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
-         * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
-         */
-        ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
-               (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
-        ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
-               (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
-        ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
-        ASSERT(lock_flags != 0);
-
-        if (lock_flags & XFS_IOLOCK_EXCL)
-                mrunlock_excl(&ip->i_iolock);
-        else if (lock_flags & XFS_IOLOCK_SHARED)
-                mrunlock_shared(&ip->i_iolock);
-
-        if (lock_flags & XFS_ILOCK_EXCL)
-                mrunlock_excl(&ip->i_lock);
-        else if (lock_flags & XFS_ILOCK_SHARED)
-                mrunlock_shared(&ip->i_lock);
-
-        trace_xfs_iunlock(ip, lock_flags, _RET_IP_);
-}
-
-/*
- * give up write locks.  the i/o lock cannot be held nested
- * if it is being demoted.
- */
-void
-xfs_ilock_demote(
-        xfs_inode_t             *ip,
-        uint                    lock_flags)
-{
-        ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL));
-        ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0);
-
-        if (lock_flags & XFS_ILOCK_EXCL)
-                mrdemote(&ip->i_lock);
-        if (lock_flags & XFS_IOLOCK_EXCL)
-                mrdemote(&ip->i_iolock);
-
-        trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_);
-}
-
-#ifdef DEBUG
-int
-xfs_isilocked(
-        xfs_inode_t             *ip,
-        uint                    lock_flags)
-{
-        if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {
-                if (!(lock_flags & XFS_ILOCK_SHARED))
-                        return !!ip->i_lock.mr_writer;
-                return rwsem_is_locked(&ip->i_lock.mr_lock);
-        }
-
-        if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) {
-                if (!(lock_flags & XFS_IOLOCK_SHARED))
-                        return !!ip->i_iolock.mr_writer;
-                return rwsem_is_locked(&ip->i_iolock.mr_lock);
-        }
-
-        ASSERT(0);
-        return 0;
-}
-#endif
-
-void
-__xfs_iflock(
-        struct xfs_inode        *ip)
-{
-        wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT);
-        DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT);
-
-        do {
-                prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
-                if (xfs_isiflocked(ip))
-                        io_schedule();
-        } while (!xfs_iflock_nowait(ip));
-
-        finish_wait(wq, &wait.wait);
-}