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vfs: mnt_want_write_file(): fix special file handling
[safe/jmp/linux-2.6]
/
fs
/
super.c
diff --git
a/fs/super.c
b/fs/super.c
index
808ffd5
..
2761d3e
100644
(file)
--- a/
fs/super.c
+++ b/
fs/super.c
@@
-620,7
+620,8
@@
int set_anon_super(struct super_block *s, void *data)
return -ENOMEM;
spin_lock(&unnamed_dev_lock);
error = ida_get_new_above(&unnamed_dev_ida, unnamed_dev_start, &dev);
return -ENOMEM;
spin_lock(&unnamed_dev_lock);
error = ida_get_new_above(&unnamed_dev_ida, unnamed_dev_start, &dev);
- unnamed_dev_start = dev + 1;
+ if (!error)
+ unnamed_dev_start = dev + 1;
spin_unlock(&unnamed_dev_lock);
if (error == -EAGAIN)
/* We raced and lost with another CPU. */
spin_unlock(&unnamed_dev_lock);
if (error == -EAGAIN)
/* We raced and lost with another CPU. */
@@
-631,7
+632,8
@@
int set_anon_super(struct super_block *s, void *data)
if ((dev & MAX_ID_MASK) == (1 << MINORBITS)) {
spin_lock(&unnamed_dev_lock);
ida_remove(&unnamed_dev_ida, dev);
if ((dev & MAX_ID_MASK) == (1 << MINORBITS)) {
spin_lock(&unnamed_dev_lock);
ida_remove(&unnamed_dev_ida, dev);
- unnamed_dev_start = dev;
+ if (unnamed_dev_start > dev)
+ unnamed_dev_start = dev;
spin_unlock(&unnamed_dev_lock);
return -EMFILE;
}
spin_unlock(&unnamed_dev_lock);
return -EMFILE;
}