Messages in this thread | | | Subject | Re: [PATCH 2/3] mm: Extract might_alloc() debug check | From | Randy Dunlap <> | Date | Fri, 20 Nov 2020 09:19:56 -0800 |
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Hi,
On 11/20/20 1:54 AM, Daniel Vetter wrote: > diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h > index d5ece7a9a403..f94405d43fd1 100644 > --- a/include/linux/sched/mm.h > +++ b/include/linux/sched/mm.h > @@ -180,6 +180,22 @@ static inline void fs_reclaim_acquire(gfp_t gfp_mask) { } > static inline void fs_reclaim_release(gfp_t gfp_mask) { } > #endif > > +/** > + * might_alloc - Marks possible allocation sites
Mark
> + * @gfp_mask: gfp_t flags that would be use to allocate
used
> + * > + * Similar to might_sleep() and other annotations this can be used in functions
annotations,
> + * that might allocate, but often dont. Compiles to nothing without
don't.
> + * CONFIG_LOCKDEP. Includes a conditional might_sleep() if @gfp allows blocking.
? might_sleep_if() if
> + */ > +static inline void might_alloc(gfp_t gfp_mask) > +{ > + fs_reclaim_acquire(gfp_mask); > + fs_reclaim_release(gfp_mask); > + > + might_sleep_if(gfpflags_allow_blocking(gfp_mask)); > +}
-- ~Randy
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