The data to do escape could be accessed directly from b_frozen_data,
just remove unneeded kmap.
Signed-off-by: Kemeng Shi <[email protected]>
Reviewed-by: Zhang Yi <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
---
fs/jbd2/journal.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 5fb5062cf7ae..c98c06f3113a 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -419,12 +419,11 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
/*
* 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;
--
2.30.0