Merge branch 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin

* 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin: (57 commits)
  fs: scale mntget/mntput
  fs: rename vfsmount counter helpers
  fs: implement faster dentry memcmp
  fs: prefetch inode data in dcache lookup
  fs: improve scalability of pseudo filesystems
  fs: dcache per-inode inode alias locking
  fs: dcache per-bucket dcache hash locking
  bit_spinlock: add required includes
  kernel: add bl_list
  xfs: provide simple rcu-walk ACL implementation
  btrfs: provide simple rcu-walk ACL implementation
  ext2,3,4: provide simple rcu-walk ACL implementation
  fs: provide simple rcu-walk generic_check_acl implementation
  fs: provide rcu-walk aware permission i_ops
  fs: rcu-walk aware d_revalidate method
  fs: cache optimise dentry and inode for rcu-walk
  fs: dcache reduce branches in lookup path
  fs: dcache remove d_mounted
  fs: fs_struct use seqlock
  fs: rcu-walk for path lookup
  ...

1 files changed, 12 insertions, 8 deletions

diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 1db6b7343229..1501db4f0e6d 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -106,7 +106,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
 {
         struct inode *inode = NULL;
 
-        dentry->d_op = &gfs2_dops;
+        d_set_d_op(dentry, &gfs2_dops);
 
         inode = gfs2_lookupi(dir, &dentry->d_name, 0);
         if (inode && IS_ERR(inode))
@@ -166,7 +166,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
         if (error)
                 goto out_child;
 
-        error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
+        error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC, 0);
         if (error)
                 goto out_gunlock;
 
@@ -289,7 +289,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
         if (IS_APPEND(&dip->i_inode))
                 return -EPERM;
 
-        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
+        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0);
         if (error)
                 return error;
 
@@ -822,7 +822,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                         }
                 }
         } else {
-                error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
+                error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC, 0);
                 if (error)
                         goto out_gunlock;
 
@@ -857,7 +857,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
         /* Check out the dir to be renamed */
 
         if (dir_rename) {
-                error = gfs2_permission(odentry->d_inode, MAY_WRITE);
+                error = gfs2_permission(odentry->d_inode, MAY_WRITE, 0);
                 if (error)
                         goto out_gunlock;
         }
@@ -1041,13 +1041,17 @@ static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  * Returns: errno
  */
 
-int gfs2_permission(struct inode *inode, int mask)
+int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
 {
-        struct gfs2_inode *ip = GFS2_I(inode);
+        struct gfs2_inode *ip;
         struct gfs2_holder i_gh;
         int error;
         int unlock = 0;
 
+        if (flags & IPERM_FLAG_RCU)
+                return -ECHILD;
+
+        ip = GFS2_I(inode);
         if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
                 if (error)
@@ -1058,7 +1062,7 @@ int gfs2_permission(struct inode *inode, int mask)
         if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
                 error = -EACCES;
         else
-                error = generic_permission(inode, mask, gfs2_check_acl);
+                error = generic_permission(inode, mask, flags, gfs2_check_acl);
         if (unlock)
                 gfs2_glock_dq_uninit(&i_gh);