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>
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index c0f8345..3c81f5e 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -2378,9 +2378,9 @@
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 @@
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;