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jbd: Use offset_in_page() instead of manual calculation 

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Namhyung Kim 2010-10-05 01:03:40 +09:00 committed by Jan Kara
parent 2b23976908
commit 8117f98c05
1 changed files with 1 additions and 1 deletions
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2
fs/jbd/transaction.c
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@ -711,7 +711,7 @@ done:
J_EXPECT_JH(jh, buffer_uptodate(jh2bh(jh)),
"Possible IO failure.\n");
page = jh2bh(jh)->b_page;
offset = ((unsigned long) jh2bh(jh)->b_data) & ~PAGE_MASK;
offset = offset_in_page(jh2bh(jh)->b_data);
source = kmap_atomic(page, KM_USER0);
memcpy(jh->b_frozen_data, source+offset, jh2bh(jh)->b_size);
kunmap_atomic(source, KM_USER0);