From f1549cb5ab2bd04cb370502b720268f610e21baa Mon Sep 17 00:00:00 2001
From: Henry Burns <henryburns@google.com>
Date: Tue, 16 Jul 2019 16:26:03 -0700
Subject: [PATCH] mm/z3fold.c: allow __GFP_HIGHMEM in z3fold_alloc
One of the gfp flags used to show that a page is movable is
__GFP_HIGHMEM. Currently z3fold_alloc() fails when __GFP_HIGHMEM is
passed. Now that z3fold pages are movable, we allow __GFP_HIGHMEM. We
strip the movability related flags from the call to kmem_cache_alloc()
for our slots since it is a kernel allocation.
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20190712222118.108192-1-henryburns@google.com
Signed-off-by: Henry Burns <henryburns@google.com>
Acked-by: Vitaly Wool <vitalywool@gmail.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/z3fold.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/mm/z3fold.c b/mm/z3fold.c
index 304f2883cdb93..e13c6228cd70e 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -195,8 +195,10 @@ static void compact_page_work(struct work_struct *w);
static inline struct z3fold_buddy_slots *alloc_slots(struct z3fold_pool *pool,
gfp_t gfp)
{
- struct z3fold_buddy_slots *slots = kmem_cache_alloc(pool->c_handle,
- gfp);
+ struct z3fold_buddy_slots *slots;
+
+ slots = kmem_cache_alloc(pool->c_handle,
+ (gfp & ~(__GFP_HIGHMEM | __GFP_MOVABLE)));
if (slots) {
memset(slots->slot, 0, sizeof(slots->slot));
@@ -853,7 +855,7 @@ static int z3fold_alloc(struct z3fold_pool *pool, size_t size, gfp_t gfp,
enum buddy bud;
bool can_sleep = gfpflags_allow_blocking(gfp);
- if (!size || (gfp & __GFP_HIGHMEM))
+ if (!size)
return -EINVAL;
if (size > PAGE_SIZE)
--
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