From c97c2916e25c56e878e3e94efd449e2d688fcb31 Mon Sep 17 00:00:00 2001
From: Li Zefan <lizf@cn.fujitsu.com>
Date: Wed, 3 Aug 2011 08:11:41 +0000
Subject: [PATCH] Btrfs: use plain page_address() in header fields setget
functions
We've stopped using highmem for extent buffers.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
fs/btrfs/ctree.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 884293642a6c7b..8b99c79ad1a731 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1415,17 +1415,15 @@ void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
static inline u##bits btrfs_##name(struct extent_buffer *eb) \
{ \
- type *p = kmap_atomic(eb->first_page, KM_USER0); \
+ type *p = page_address(eb->first_page); \
u##bits res = le##bits##_to_cpu(p->member); \
- kunmap_atomic(p, KM_USER0); \
return res; \
} \
static inline void btrfs_set_##name(struct extent_buffer *eb, \
u##bits val) \
{ \
- type *p = kmap_atomic(eb->first_page, KM_USER0); \
+ type *p = page_address(eb->first_page); \
p->member = cpu_to_le##bits(val); \
- kunmap_atomic(p, KM_USER0); \
}
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
--
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