Re: [PATCH 1/2 v3] cleanup: Add cond_guard() to conditional guards

[Ira Weiny]

Fabio M. De Francesco wrote:
> Add cond_guard() macro to conditional guards.
> 
> cond_guard() is a guard to be used with the conditional variants of locks,
> like down_read_trylock() or mutex_lock_interruptible().
> 
> It takes a statement (or statement-expression) that is passed as its
> second argument. That statement (or statement-expression) is executed if
> waiting for a lock is interrupted or if a _trylock() fails in case of
> contention.
> 
> Usage example:
> 
> 	cond_guard(mutex_intr, return -EINTR, &mutex);
> 
> Consistent with other usage of _guard(), locks are unlocked at the exit of the
> scope where cond_guard() is called.
> 
> Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
> Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> Suggested-by: Ira Weiny <ira.weiny@xxxxxxxxx>

Thanks for the revisions!

Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>