Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

[deliverable/linux.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 86d4db15473e51b3b95fa4103eedf28227cc336a..9f2c13417969f564ef502ed3745a04d144419820 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -536,7 +536,7 @@ restart:
  */
 static void prune_dcache(int count)
 {
-       struct super_block *sb, *n;
+       struct super_block *sb, *p = NULL;
        int w_count;
        int unused = dentry_stat.nr_unused;
        int prune_ratio;
@@ -550,7 +550,7 @@ static void prune_dcache(int count)
        else
                prune_ratio = unused / count;
        spin_lock(&sb_lock);
-       list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
+       list_for_each_entry(sb, &super_blocks, s_list) {
                if (list_empty(&sb->s_instances))
                        continue;
                if (sb->s_nr_dentry_unused == 0)
@@ -590,14 +590,16 @@ static void prune_dcache(int count)
                        up_read(&sb->s_umount);
                }
                spin_lock(&sb_lock);
-               /* lock was dropped, must reset next */
-               list_safe_reset_next(sb, n, s_list);
+               if (p)
+                       __put_super(p);
                count -= pruned;
-               __put_super(sb);
+               p = sb;
                /* more work left to do? */
                if (count <= 0)
                        break;
        }
+       if (p)
+               __put_super(p);
        spin_unlock(&sb_lock);
        spin_unlock(&dcache_lock);
 }
@@ -2049,16 +2051,12 @@ char *dynamic_dname(struct dentry *dentry, char *buffer, int buflen,
 /*
  * Write full pathname from the root of the filesystem into the buffer.
  */
-char *dentry_path(struct dentry *dentry, char *buf, int buflen)
+char *__dentry_path(struct dentry *dentry, char *buf, int buflen)
 {
        char *end = buf + buflen;
        char *retval;
 
-       spin_lock(&dcache_lock);
        prepend(&end, &buflen, "\0", 1);
-       if (d_unlinked(dentry) &&
-               (prepend(&end, &buflen, "//deleted", 9) != 0))
-                       goto Elong;
        if (buflen < 1)
                goto Elong;
        /* Get '/' right */
@@ -2076,7 +2074,28 @@ char *dentry_path(struct dentry *dentry, char *buf, int buflen)
                retval = end;
                dentry = parent;
        }
+       return retval;
+Elong:
+       return ERR_PTR(-ENAMETOOLONG);
+}
+EXPORT_SYMBOL(__dentry_path);
+
+char *dentry_path(struct dentry *dentry, char *buf, int buflen)
+{
+       char *p = NULL;
+       char *retval;
+
+       spin_lock(&dcache_lock);
+       if (d_unlinked(dentry)) {
+               p = buf + buflen;
+               if (prepend(&p, &buflen, "//deleted", 10) != 0)
+                       goto Elong;
+               buflen++;
+       }
+       retval = __dentry_path(dentry, buf, buflen);
        spin_unlock(&dcache_lock);
+       if (!IS_ERR(retval) && p)
+               *p = '/';       /* restore '/' overriden with '\0' */
        return retval;
 Elong:
        spin_unlock(&dcache_lock);