On Sun, Jun 30, 2013 at 8:19 PM, Oleg Nesterov <[email protected]> wrote: > Andrew, please drop these > > wait-introduce-wait_event_commonwq-condition-state-timeout.patch > wait-introduce-prepare_to_wait_event.patch > > patches again. I'll send v3 although it really looks like I should > never try to touch wait.h. > > On 06/29, Sedat Dilek wrote: >> >> As this all did not show me what caused the problem I started a >> git-bisect session. >> >> This revealed the following culprit commit: >> >> commit bb1f30cb7d3ba21098f0ee7e0382160ba2599a43 >> "wait: introduce wait_event_common(wq, condition, state, timeout)" > > Heh. First of all, I am really sorry. > > Not only "__wait_no_timeout(tout) ?:" was wrong, I didn't bother > to recheck this logic even after I got the "warning: the omitted > middle operand in ?:" reports. > > Sedat, thanks you very much! Any chance you can try the patch below? >
Thanks for the quick fix!
No worries. Good we catched the issue, now.
Yupp, the patch fixes the issue here.
Please, send a patch against reported tree (here: next-20130628) next time.
( Attached is the one which applied here. )
I have zero clue about that "tout-tout" and "?" but you should keep
coding-style within your patch?
...
+ __ret = __wait_no_timeout(tout) ? 0 : \
+ (__tout ?: 1);
\ <--- ((__tout) ?: 1) like below ((tout) ?: 1)
...
+ __ret = __wait_no_timeout(tout) ? 0 : ((tout) ?: 1); \
Feel free to give credits :-).
- Sedat -
> Oleg.
>
>
> --- a/include/linux/wait.h
> +++ b/include/linux/wait.h
> @@ -191,12 +191,8 @@ wait_queue_head_t *bit_waitqueue(void *, int);
> for (;;) { \
> __ret = prepare_to_wait_event(&wq, &__wait, state); \
> if (condition) { \
> - __ret = __wait_no_timeout(tout); \
> - if (!__ret) { \
> - __ret = __tout; \
> - if (!__ret) \
> - __ret = 1; \
> - } \
> + __ret = __wait_no_timeout(tout) ? 0 : \
> + (__tout ?: 1); \
> break; \
> } \
> \
> @@ -217,16 +213,10 @@ wait_queue_head_t *bit_waitqueue(void *, int);
> #define wait_event_common(wq, condition, state, tout) \
> ({ \
> long __ret; \
> - if (condition) { \
> - __ret = __wait_no_timeout(tout); \
> - if (!__ret) { \
> - __ret = tout; \
> - if (!__ret) \
> - __ret = 1; \
> - } \
> - } else { \
> + if (condition) \
> + __ret = __wait_no_timeout(tout) ? 0 : ((tout) ?: 1); \
> + else \
> __ret = __wait_event_common(wq, condition, state, tout);\
> - } \
> __ret; \
> })
>
>
3.10.0-rc7-next20130628-10-iniza-small.patch
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