[XFS] kill xfs_rwlock/xfs_rwunlock

We can just use xfs_ilock/xfs_iunlock instead and get rid of the ugly
bhv_vrwlock_t.

SGI-PV: 976035
SGI-Modid: xfs-linux-melb:xfs-kern:30533a

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

6 files changed, 16 insertions, 76 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index e0519529c26..169e6c06279 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1532,9 +1532,9 @@ xfs_vm_bmap(
         struct xfs_inode        *ip = XFS_I(inode);
 
         xfs_itrace_entry(XFS_I(inode));
-        xfs_rwlock(ip, VRWLOCK_READ);
+        xfs_ilock(ip, XFS_IOLOCK_SHARED);
         xfs_flush_pages(ip, (xfs_off_t)0, -1, 0, FI_REMAPF);
-        xfs_rwunlock(ip, VRWLOCK_READ);
+        xfs_iunlock(ip, XFS_IOLOCK_SHARED);
         return generic_block_bmap(mapping, block, xfs_get_blocks);
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 16635338849..3c20007ab48 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -228,11 +228,11 @@ xfs_read(
         xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
         if (DM_EVENT_ENABLED(ip, DM_EVENT_READ) && !(ioflags & IO_INVIS)) {
-                bhv_vrwlock_t locktype = VRWLOCK_READ;
                 int dmflags = FILP_DELAY_FLAG(file) | DM_SEM_FLAG_RD(ioflags);
+                int iolock = XFS_IOLOCK_SHARED;
 
                 ret = -XFS_SEND_DATA(mp, DM_EVENT_READ, vp, *offset, size,
-                                        dmflags, &locktype);
+                                        dmflags, &iolock);
                 if (ret) {
                         xfs_iunlock(ip, XFS_IOLOCK_SHARED);
                         if (unlikely(ioflags & IO_ISDIRECT))
@@ -287,11 +287,11 @@ xfs_splice_read(
         xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
         if (DM_EVENT_ENABLED(ip, DM_EVENT_READ) && !(ioflags & IO_INVIS)) {
-                bhv_vrwlock_t locktype = VRWLOCK_READ;
+                int iolock = XFS_IOLOCK_SHARED;
                 int error;
 
                 error = XFS_SEND_DATA(mp, DM_EVENT_READ, vp, *ppos, count,
-                                        FILP_DELAY_FLAG(infilp), &locktype);
+                                        FILP_DELAY_FLAG(infilp), &iolock);
                 if (error) {
                         xfs_iunlock(ip, XFS_IOLOCK_SHARED);
                         return -error;
@@ -330,11 +330,11 @@ xfs_splice_write(
         xfs_ilock(ip, XFS_IOLOCK_EXCL);
 
         if (DM_EVENT_ENABLED(ip, DM_EVENT_WRITE) && !(ioflags & IO_INVIS)) {
-                bhv_vrwlock_t locktype = VRWLOCK_WRITE;
+                int iolock = XFS_IOLOCK_EXCL;
                 int error;
 
                 error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp, *ppos, count,
-                                        FILP_DELAY_FLAG(outfilp), &locktype);
+                                        FILP_DELAY_FLAG(outfilp), &iolock);
                 if (error) {
                         xfs_iunlock(ip, XFS_IOLOCK_EXCL);
                         return -error;
@@ -580,7 +580,6 @@ xfs_write(
         xfs_fsize_t             isize, new_size;
         int                     iolock;
         int                     eventsent = 0;
-        bhv_vrwlock_t           locktype;
         size_t                  ocount = 0, count;
         loff_t                  pos;
         int                     need_i_mutex;
@@ -607,11 +606,9 @@ xfs_write(
 relock:
         if (ioflags & IO_ISDIRECT) {
                 iolock = XFS_IOLOCK_SHARED;
-                locktype = VRWLOCK_WRITE_DIRECT;
                 need_i_mutex = 0;
         } else {
                 iolock = XFS_IOLOCK_EXCL;
-                locktype = VRWLOCK_WRITE;
                 need_i_mutex = 1;
                 mutex_lock(&inode->i_mutex);
         }
@@ -635,8 +632,7 @@ start:
 
                 xfs_iunlock(xip, XFS_ILOCK_EXCL);
                 error = XFS_SEND_DATA(xip->i_mount, DM_EVENT_WRITE, vp,
-                                      pos, count,
-                                      dmflags, &locktype);
+                                      pos, count, dmflags, &iolock);
                 if (error) {
                         goto out_unlock_internal;
                 }
@@ -667,7 +663,6 @@ start:
                 if (!need_i_mutex && (VN_CACHED(vp) || pos > xip->i_size)) {
                         xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
                         iolock = XFS_IOLOCK_EXCL;
-                        locktype = VRWLOCK_WRITE;
                         need_i_mutex = 1;
                         mutex_lock(&inode->i_mutex);
                         xfs_ilock(xip, XFS_ILOCK_EXCL|iolock);
@@ -744,7 +739,6 @@ retry:
                         mutex_unlock(&inode->i_mutex);
 
                         iolock = XFS_IOLOCK_SHARED;
-                        locktype = VRWLOCK_WRITE_DIRECT;
                         need_i_mutex = 0;
                 }
 
@@ -781,7 +775,7 @@ retry:
 
         if (ret == -ENOSPC &&
             DM_EVENT_ENABLED(xip, DM_EVENT_NOSPACE) && !(ioflags & IO_INVIS)) {
-                xfs_rwunlock(xip, locktype);
+                xfs_iunlock(xip, iolock);
                 if (need_i_mutex)
                         mutex_unlock(&inode->i_mutex);
                 error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp,
@@ -789,7 +783,7 @@ retry:
                                 0, 0, 0); /* Delay flag intentionally  unused */
                 if (need_i_mutex)
                         mutex_lock(&inode->i_mutex);
-                xfs_rwlock(xip, locktype);
+                xfs_ilock(xip, iolock);
                 if (error)
                         goto out_unlock_internal;
                 pos = xip->i_size;
@@ -817,7 +811,8 @@ retry:
         /* Handle various SYNC-type writes */
         if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
                 int error2;
-                xfs_rwunlock(xip, locktype);
+
+                xfs_iunlock(xip, iolock);
                 if (need_i_mutex)
                         mutex_unlock(&inode->i_mutex);
                 error2 = sync_page_range(inode, mapping, pos, ret);
@@ -825,7 +820,7 @@ retry:
                         error = error2;
                 if (need_i_mutex)
                         mutex_lock(&inode->i_mutex);
-                xfs_rwlock(xip, locktype);
+                xfs_ilock(xip, iolock);
                 error2 = xfs_write_sync_logforce(mp, xip);
                 if (!error)
                         error = error2;
@@ -846,7 +841,7 @@ retry:
                         xip->i_d.di_size = xip->i_size;
                 xfs_iunlock(xip, XFS_ILOCK_EXCL);
         }
-        xfs_rwunlock(xip, locktype);
+        xfs_iunlock(xip, iolock);
  out_unlock_mutex:
         if (need_i_mutex)
                 mutex_unlock(&inode->i_mutex);
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 20223182828..4ed5914adef 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -46,18 +46,6 @@ static inline struct inode *vn_to_inode(bhv_vnode_t *vnode)
 }
 
 /*
- * Values for the vop_rwlock/rwunlock flags parameter.
- */
-typedef enum bhv_vrwlock {
-        VRWLOCK_NONE,
-        VRWLOCK_READ,
-        VRWLOCK_WRITE,
-        VRWLOCK_WRITE_DIRECT,
-        VRWLOCK_TRY_READ,
-        VRWLOCK_TRY_WRITE
-} bhv_vrwlock_t;
-
-/*
  * Return values for xfs_inactive.  A return value of
  * VN_INACTIVE_NOCACHE implies that the file system behavior
  * has disassociated its state and bhv_desc_t from the vnode.
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 1d8a4728d84..110ee83fcbe 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -67,7 +67,7 @@ struct xfs_mru_cache;
  */
 
 typedef int     (*xfs_send_data_t)(int, bhv_vnode_t *,
-                        xfs_off_t, size_t, int, bhv_vrwlock_t *);
+                        xfs_off_t, size_t, int, int *);
 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
 typedef int     (*xfs_send_destroy_t)(bhv_vnode_t *, dm_right_t);
 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 4765e7c4b75..811ee874d86 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -3375,47 +3375,6 @@ std_return:
 }
 
 int
-xfs_rwlock(
-        xfs_inode_t     *ip,
-        bhv_vrwlock_t   locktype)
-{
-        if (S_ISDIR(ip->i_d.di_mode))
-                return 1;
-        if (locktype == VRWLOCK_WRITE) {
-                xfs_ilock(ip, XFS_IOLOCK_EXCL);
-        } else if (locktype == VRWLOCK_TRY_READ) {
-                return xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED);
-        } else if (locktype == VRWLOCK_TRY_WRITE) {
-                return xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL);
-        } else {
-                ASSERT((locktype == VRWLOCK_READ) ||
-                       (locktype == VRWLOCK_WRITE_DIRECT));
-                xfs_ilock(ip, XFS_IOLOCK_SHARED);
-        }
-
-        return 1;
-}
-
-
-void
-xfs_rwunlock(
-        xfs_inode_t     *ip,
-        bhv_vrwlock_t   locktype)
-{
-        if (S_ISDIR(ip->i_d.di_mode))
-                return;
-        if (locktype == VRWLOCK_WRITE) {
-                xfs_iunlock(ip, XFS_IOLOCK_EXCL);
-        } else {
-                ASSERT((locktype == VRWLOCK_READ) ||
-                       (locktype == VRWLOCK_WRITE_DIRECT));
-                xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-        }
-        return;
-}
-
-
-int
 xfs_inode_flush(
         xfs_inode_t     *ip,
         int             flags)
diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h
index 4e3970f0e5e..85340bafd42 100644
--- a/fs/xfs/xfs_vnodeops.h
+++ b/fs/xfs/xfs_vnodeops.h
@@ -38,8 +38,6 @@ int xfs_readdir(struct xfs_inode	*dp, void *dirent, size_t bufsize,
 int xfs_symlink(struct xfs_inode *dp, bhv_vname_t *dentry,
                 char *target_path, mode_t mode, bhv_vnode_t **vpp,
                 struct cred *credp);
-int xfs_rwlock(struct xfs_inode *ip, bhv_vrwlock_t locktype);
-void xfs_rwunlock(struct xfs_inode *ip, bhv_vrwlock_t locktype);
 int xfs_inode_flush(struct xfs_inode *ip, int flags);
 int xfs_set_dmattrs(struct xfs_inode *ip, u_int evmask, u_int16_t state);
 int xfs_reclaim(struct xfs_inode *ip);