jbd2: remove unneeded done_copy_out variable in jbd2_journal_write_metadata_buffer
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>
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@ -318,7 +318,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
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struct buffer_head **bh_out,
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sector_t blocknr)
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{
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int done_copy_out = 0;
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int do_escape = 0;
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char *mapped_data;
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struct buffer_head *new_bh;
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@ -349,7 +348,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
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* we use that version of the data for the commit.
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*/
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if (jh_in->b_frozen_data) {
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done_copy_out = 1;
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new_folio = virt_to_folio(jh_in->b_frozen_data);
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new_offset = offset_in_folio(new_folio, jh_in->b_frozen_data);
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mapped_data = jh_in->b_frozen_data;
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@ -357,17 +355,15 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
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new_folio = bh_in->b_folio;
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new_offset = offset_in_folio(new_folio, bh_in->b_data);
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mapped_data = kmap_local_folio(new_folio, new_offset);
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}
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/*
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* Fire data frozen trigger if data already wasn't frozen. Do this
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* before checking for escaping, as the trigger may modify the magic
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* offset. If a copy-out happens afterwards, it will have the correct
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* data in the buffer.
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*/
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if (!done_copy_out)
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/*
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* Fire data frozen trigger if data already wasn't frozen. Do
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* this before checking for escaping, as the trigger may modify
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* the magic offset. If a copy-out happens afterwards, it will
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* have the correct data in the buffer.
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*/
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jbd2_buffer_frozen_trigger(jh_in, mapped_data,
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jh_in->b_triggers);
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}
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/*
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* Check for escaping
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@ -380,7 +376,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
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/*
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* Do we need to do a data copy?
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*/
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if (do_escape && !done_copy_out) {
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if (do_escape && !jh_in->b_frozen_data) {
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char *tmp;
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spin_unlock(&jh_in->b_state_lock);
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@ -408,7 +404,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
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copy_done:
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new_folio = virt_to_folio(jh_in->b_frozen_data);
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new_offset = offset_in_folio(new_folio, jh_in->b_frozen_data);
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done_copy_out = 1;
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}
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/*
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