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Btrfs: Avoid recursive KM_USER1 mappings in copy_extent_buffer

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason
2007-10-19 10:39:41 -04:00
parent 3685f79165
commit ff190c0c00
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/extent_map.c
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@@ -2586,9 +2586,9 @@ void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
cur = min(len, (unsigned long)(PAGE_CACHE_SIZE - offset)); cur = min(len, (unsigned long)(PAGE_CACHE_SIZE - offset));
kaddr = kmap_atomic(page, KM_USER1); kaddr = kmap_atomic(page, KM_USER0);
read_extent_buffer(src, kaddr + offset, src_offset, cur); read_extent_buffer(src, kaddr + offset, src_offset, cur);
kunmap_atomic(kaddr, KM_USER1); kunmap_atomic(kaddr, KM_USER0);
src_offset += cur; src_offset += cur;
len -= cur; len -= cur;