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Message-Id: <20071116134642.2dda1600.akpm@linux-foundation.org>
Date: Fri, 16 Nov 2007 13:46:42 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Alexey Dobriyan <adobriyan@...ru>
Cc: linux-kernel@...r.kernel.org, devel@...nvz.org
Subject: Re: [PATCH] proc: use BUG_ON() in de_put()
On Thu, 15 Nov 2007 19:12:49 +0300
Alexey Dobriyan <adobriyan@...ru> wrote:
> It's much more visible that some printk. I still has an unexplained oops
> in proc, so let's leave it for a while.
>
> Signed-off-by: Alexey Dobriyan <adobriyan@...ru>
> ---
>
> fs/proc/inode.c | 7 +------
> 1 file changed, 1 insertion(+), 6 deletions(-)
>
> --- a/fs/proc/inode.c
> +++ b/fs/proc/inode.c
> @@ -37,12 +37,7 @@ void de_put(struct proc_dir_entry *de)
> {
> if (de) {
> lock_kernel();
> - if (!atomic_read(&de->count)) {
> - printk("de_put: entry %s already free!\n", de->name);
> - unlock_kernel();
> - return;
> - }
> -
> + BUG_ON(atomic_read(&de->count) == 0);
> if (atomic_dec_and_test(&de->count)) {
> if (de->deleted) {
> printk("de_put: deferred delete of %s\n",
I don't see that an error in here _requires_ that we nuke the machine.
Surely we can emit a warning and then recover in some fashion?
-
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