proc: use BUG_ON() in de_put()
PATCH 1/1 proc: use BUG_ON() in de_put()
It's much more visible that some printk. I still has an unexplained oops in proc, so let's leave it for a while.
---
fs/proc/inode.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
fs/proc/inode.c +1 -6
@@ -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",
Quoted 15 lines · On Thu, 15 Nov 2007 19:12:49 +0300 Alexey Dobriyan <[email protected]> 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 <[email protected]>---
fs/proc/inode.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)fs/proc/inode.c +0
-0@@ -37,12 +37,7 @@ void de_put(struct proc_dir_entry *de) {if (de) {lock_kernel ();
fs/proc/inode.c void de_put(struct proc_dir_entry *de) · line 43
Quoted 10 lines
fs/proc/inode.c +1
-6-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?
Quoted 17 lines · Andrew Morton
Quoted 14 lines · On Thu, 15 Nov 2007 19:12:49 +0300 Alexey Dobriyan <[email protected]> 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.
fs/proc/inode.c +0
-5@@ -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 ; - }
Quoted 8 lines
fs/proc/inode.c void de_put(struct proc_dir_entry *de) · line 43
Quoted 5 lines
fs/proc/inode.c +1
-1- +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?
Hmm... atomic_dec_and_test() in -mm already has diagnostics¹ when doing 0 => -1 transition, google says this check triggered only once. I think we should just drop it.
¹ i386 only :^)