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-rw-r--r--fs/proc/generic.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index e37ea3e53de8..b9dd3628d43a 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -521,6 +521,7 @@ static const struct inode_operations proc_dir_inode_operations = {
521static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp) 521static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
522{ 522{
523 unsigned int i; 523 unsigned int i;
524 struct proc_dir_entry *tmp;
524 525
525 i = get_inode_number(); 526 i = get_inode_number();
526 if (i == 0) 527 if (i == 0)
@@ -544,6 +545,15 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
544 } 545 }
545 546
546 spin_lock(&proc_subdir_lock); 547 spin_lock(&proc_subdir_lock);
548
549 for (tmp = dir->subdir; tmp; tmp = tmp->next)
550 if (strcmp(tmp->name, dp->name) == 0) {
551 printk(KERN_WARNING "proc_dir_entry '%s' already "
552 "registered\n", dp->name);
553 dump_stack();
554 break;
555 }
556
547 dp->next = dir->subdir; 557 dp->next = dir->subdir;
548 dp->parent = dir; 558 dp->parent = dir;
549 dir->subdir = dp; 559 dir->subdir = dp;