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Btrfs: Fix read/write_extent_buffer to use KM_USER1 instead of KM_USER0 

This avoids recursive use of KM_USER0 during btrfs_file_write

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-10-19 09:23:09 -04:00
parent b4a2a0edfd
commit 59d169e2b3
1 changed files with 4 additions and 4 deletions
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8
fs/btrfs/extent_map.c
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@ -2378,9 +2378,9 @@ void read_extent_buffer(struct extent_buffer *eb, void *dstv,
WARN_ON(!PageUptodate(page));
cur = min(len, (PAGE_CACHE_SIZE - offset));
kaddr = kmap_atomic(page, KM_USER0);
kaddr = kmap_atomic(page, KM_USER1);
memcpy(dst, kaddr + offset, cur);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr, KM_USER1);
dst += cur;
len -= cur;
@ -2523,9 +2523,9 @@ void write_extent_buffer(struct extent_buffer *eb, const void *srcv,
WARN_ON(!PageUptodate(page));
cur = min(len, PAGE_CACHE_SIZE - offset);
kaddr = kmap_atomic(page, KM_USER0);
kaddr = kmap_atomic(page, KM_USER1);
memcpy(kaddr + offset, src, cur);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr, KM_USER1);
src += cur;
len -= cur;