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Message-ID: <HK2PR03MB16848D9371E00E9029FCC94092950@HK2PR03MB1684.apcprd03.prod.outlook.com>
Date: Mon, 21 May 2018 18:01:36 +0000
From: Huaisheng HS1 Ye <yehs1@...ovo.com>
To: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
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Subject: [RFC PATCH v2 07/12] fs/btrfs/extent_io: update usage of address zone
modifiers
Use __GFP_ZONE_MASK to replace (__GFP_DMA32 | __GFP_HIGHMEM).
In function alloc_extent_state, it is obvious that __GFP_DMA is not
the expecting zone type.
___GFP_DMA, ___GFP_HIGHMEM and ___GFP_DMA32 have been deleted from GFP
bitmasks, the bottom three bits of GFP mask is reserved for storing
encoded zone number.
__GFP_DMA, __GFP_HIGHMEM and __GFP_DMA32 should not be operated with
each others by OR.
Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
Cc: Chris Mason <clm@...com>
Cc: Josef Bacik <jbacik@...com>
Cc: David Sterba <dsterba@...e.com>
---
fs/btrfs/extent_io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dfeb74a..6653e9a 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -220,7 +220,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask)
* The given mask might be not appropriate for the slab allocator,
* drop the unsupported bits
*/
- mask &= ~(__GFP_DMA32|__GFP_HIGHMEM);
+ mask &= ~__GFP_ZONE_MASK;
state = kmem_cache_alloc(extent_state_cache, mask);
if (!state)
return state;
--
1.8.3.1
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