+ mm-mempool-use-might_alloc.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/mempool: use might_alloc()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-mempool-use-might_alloc.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mempool-use-might_alloc.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Subject: mm/mempool: use might_alloc()
Date: Sun, 5 Jun 2022 17:25:39 +0200

mempool are generally used for GFP_NOIO, so this wont benefit all that
much because might_alloc currently only checks GFP_NOFS.  But it does
validate against mmu notifier pte zapping, some might catch some drivers
doing really silly things, plus it's a bit more meaningful in what we're
checking for here.

Link: https://lkml.kernel.org/r/20220605152539.3196045-3-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mempool.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/mempool.c~mm-mempool-use-might_alloc
+++ a/mm/mempool.c
@@ -379,7 +379,7 @@ void *mempool_alloc(mempool_t *pool, gfp
 	gfp_t gfp_temp;
 
 	VM_WARN_ON_ONCE(gfp_mask & __GFP_ZERO);
-	might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM);
+	might_alloc(gfp_mask);
 
 	gfp_mask |= __GFP_NOMEMALLOC;	/* don't allocate emergency reserves */
 	gfp_mask |= __GFP_NORETRY;	/* don't loop in __alloc_pages */
_

Patches currently in -mm which might be from daniel.vetter@ffwll.ch are

mm-page_alloc-use-might_alloc.patch
mm-slab-delete-cache_alloc_debugcheck_before.patch
mm-mempool-use-might_alloc.patch