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jbd2: remove unneeded kmap to do escape in jbd2_journal_write_metadata_buffer

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The data to do escape could be accessed directly from b_frozen_data,
just remove unneeded kmap.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20240514112438.1269037-6-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Kemeng Shi 2024-05-14 19:24:34 +08:00 committed by Theodore Ts'o
parent 4c15129aaa
commit daabedd664
1 changed files with 4 additions and 5 deletions
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9
fs/jbd2/journal.c
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@ -419,12 +419,11 @@ copy_done:
/*
* Did we need to do an escaping? Now we've done all the
* copying, we can finally do so.
* b_frozen_data is from jbd2_alloc() which always provides an
* address from the direct kernels mapping.
*/
if (do_escape) {
mapped_data = kmap_local_folio(new_folio, new_offset);
*((unsigned int *)mapped_data) = 0;
kunmap_local(mapped_data);
}
if (do_escape)
*((unsigned int *)jh_in->b_frozen_data) = 0;
folio_set_bh(new_bh, new_folio, new_offset);
new_bh->b_size = bh_in->b_size;