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jbd2: remove unneeded done_copy_out variable in jbd2_journal_write_metadata_buffer

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It's more intuitive to use jh_in->b_frozen_data directly instead of
done_copy_out variable. Simply remove unneeded done_copy_out variable
and use b_frozen_data instead.

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/20240801013815.2393869-6-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Kemeng Shi 2024-08-01 09:38:12 +08:00 committed by Theodore Ts'o
parent debbfd991f
commit 7c48e7d5a1
1 changed files with 8 additions and 13 deletions
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21
fs/jbd2/journal.c
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@ -318,7 +318,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
struct buffer_head **bh_out,
sector_t blocknr)
{
int done_copy_out = 0;
int do_escape = 0;
char *mapped_data;
struct buffer_head *new_bh;
@ -349,7 +348,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
* we use that version of the data for the commit.
*/
if (jh_in->b_frozen_data) {
done_copy_out = 1;
new_folio = virt_to_folio(jh_in->b_frozen_data);
new_offset = offset_in_folio(new_folio, jh_in->b_frozen_data);
mapped_data = jh_in->b_frozen_data;
@ -357,17 +355,15 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
new_folio = bh_in->b_folio;
new_offset = offset_in_folio(new_folio, bh_in->b_data);
mapped_data = kmap_local_folio(new_folio, new_offset);
}
/*
* Fire data frozen trigger if data already wasn't frozen. Do this
* before checking for escaping, as the trigger may modify the magic
* offset. If a copy-out happens afterwards, it will have the correct
* data in the buffer.
*/
if (!done_copy_out)
/*
* Fire data frozen trigger if data already wasn't frozen. Do
* this before checking for escaping, as the trigger may modify
* the magic offset. If a copy-out happens afterwards, it will
* have the correct data in the buffer.
*/
jbd2_buffer_frozen_trigger(jh_in, mapped_data,
jh_in->b_triggers);
}
/*
* Check for escaping
@ -380,7 +376,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
/*
* Do we need to do a data copy?
*/
if (do_escape && !done_copy_out) {
if (do_escape && !jh_in->b_frozen_data) {
char *tmp;
spin_unlock(&jh_in->b_state_lock);
@ -408,7 +404,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
copy_done:
new_folio = virt_to_folio(jh_in->b_frozen_data);
new_offset = offset_in_folio(new_folio, jh_in->b_frozen_data);
done_copy_out = 1;
}
/*