drm/rockchip: vop: report error when check resource error

[firefly-linux-kernel-4.4.55.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 108d7d810be3ffafcb0dfc65cc3d1bf23a8e1301..7b8feb6d60c8285234d4dd7cbd82b7604addf484 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -578,7 +578,6 @@ static struct dentry *dentry_kill(struct dentry *dentry)
 
 failed:
        spin_unlock(&dentry->d_lock);
-       cpu_relax();
        return dentry; /* try again with same dentry */
 }
 
@@ -752,6 +751,8 @@ void dput(struct dentry *dentry)
                return;
 
 repeat:
+       might_sleep();
+
        rcu_read_lock();
        if (likely(fast_dput(dentry))) {
                rcu_read_unlock();
@@ -783,8 +784,10 @@ repeat:
 
 kill_it:
        dentry = dentry_kill(dentry);
-       if (dentry)
+       if (dentry) {
+               cond_resched();
                goto repeat;
+       }
 }
 EXPORT_SYMBOL(dput);
 
@@ -1319,8 +1322,11 @@ int d_set_mounted(struct dentry *dentry)
        }
        spin_lock(&dentry->d_lock);
        if (!d_unlinked(dentry)) {
-               dentry->d_flags |= DCACHE_MOUNTED;
-               ret = 0;
+               ret = -EBUSY;
+               if (!d_mountpoint(dentry)) {
+                       dentry->d_flags |= DCACHE_MOUNTED;
+                       ret = 0;
+               }
        }
        spin_unlock(&dentry->d_lock);
 out:
@@ -3020,6 +3026,7 @@ char *d_absolute_path(const struct path *path,
                return ERR_PTR(error);
        return res;
 }
+EXPORT_SYMBOL(d_absolute_path);
 
 /*
  * same as __d_path but appends "(deleted)" for unlinked files.