diff mbox

[RFC,v2,07/12] fs/btrfs/extent_io: update usage of address zone modifiers

Message ID HK2PR03MB16848D9371E00E9029FCC94092950@HK2PR03MB1684.apcprd03.prod.outlook.com (mailing list archive)
State New, archived
Headers show

Commit Message

Huaisheng HS1 Ye May 21, 2018, 6:01 p.m. UTC 
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@lenovo.com>
Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fb.com>
Cc: David Sterba <dsterba@suse.com>
---
 fs/btrfs/extent_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

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;