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| author | Zhang Rui <rui.zhang@intel.com> | 2008-02-08 04:18:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:23 -0800 |
| commit | 94413d8807a3c511a3675be4ce27a4d16d6408ee (patch) | |
| tree | d20800024bdfe15d4f6ae1e7cc63a537127afab4 /fs/proc/generic.c | |
| parent | fd2cbe48883a01f710c2a639877e3b3e4eba6e59 (diff) | |
| download | linux-94413d8807a3c511a3675be4ce27a4d16d6408ee.tar.gz linux-94413d8807a3c511a3675be4ce27a4d16d6408ee.tar.bz2 linux-94413d8807a3c511a3675be4ce27a4d16d6408ee.zip | |
proc: detect duplicate names on registration
Print a warning if PDE is registered with a name which already exists in
target directory.
Bug report and a simple fix can be found here:
http://bugzilla.kernel.org/show_bug.cgi?id=8798
[\n fixlet and no undescriptive variable usage --adobriyan]
[akpm@linux-foundation.org: make printk comprehensible]
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/generic.c')
| -rw-r--r-- | fs/proc/generic.c | 10 |
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 = { static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp) { unsigned int i; + struct proc_dir_entry *tmp; i = get_inode_number(); if (i == 0) @@ -544,6 +545,15 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp } spin_lock(&proc_subdir_lock); + + for (tmp = dir->subdir; tmp; tmp = tmp->next) + if (strcmp(tmp->name, dp->name) == 0) { + printk(KERN_WARNING "proc_dir_entry '%s' already " + "registered\n", dp->name); + dump_stack(); + break; + } + dp->next = dir->subdir; dp->parent = dir; dir->subdir = dp; |