diff options
author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-07-13 04:55:11 +0100 |
---|---|---|
committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:30 -0700 |
commit | 8147c4c4546f9f05ef03bb839b741473b28bb560 (patch) | |
tree | 8ef52af7514fc424bc9986c3439101d0e5e56318 /fs/jbd2 | |
parent | 07811230c3cd820a88c3429c646d3fa60aac65e5 (diff) |
jbd2: use a folio in jbd2_journal_write_metadata_buffer()
The primary goal here is removing the use of set_bh_page(). Take the
opportunity to switch from kmap_atomic() to kmap_local(). This simplifies
the function as the offset is already added to the pointer.
Link: https://lkml.kernel.org/r/20230713035512.4139457-7-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Sterba <dsterba@suse.com>
Cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/jbd2')
-rw-r--r-- | fs/jbd2/journal.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index fbce16fedaa4..1b5a45ab62b0 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -341,7 +341,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction, int do_escape = 0; char *mapped_data; struct buffer_head *new_bh; - struct page *new_page; + struct folio *new_folio; unsigned int new_offset; struct buffer_head *bh_in = jh2bh(jh_in); journal_t *journal = transaction->t_journal; @@ -370,14 +370,14 @@ repeat: */ if (jh_in->b_frozen_data) { done_copy_out = 1; - new_page = virt_to_page(jh_in->b_frozen_data); - new_offset = offset_in_page(jh_in->b_frozen_data); + new_folio = virt_to_folio(jh_in->b_frozen_data); + new_offset = offset_in_folio(new_folio, jh_in->b_frozen_data); } else { - new_page = jh2bh(jh_in)->b_page; - new_offset = offset_in_page(jh2bh(jh_in)->b_data); + new_folio = jh2bh(jh_in)->b_folio; + new_offset = offset_in_folio(new_folio, jh2bh(jh_in)->b_data); } - mapped_data = kmap_atomic(new_page); + 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 @@ -385,18 +385,17 @@ repeat: * data in the buffer. */ if (!done_copy_out) - jbd2_buffer_frozen_trigger(jh_in, mapped_data + new_offset, + jbd2_buffer_frozen_trigger(jh_in, mapped_data, jh_in->b_triggers); /* * Check for escaping */ - if (*((__be32 *)(mapped_data + new_offset)) == - cpu_to_be32(JBD2_MAGIC_NUMBER)) { + if (*((__be32 *)mapped_data) == cpu_to_be32(JBD2_MAGIC_NUMBER)) { need_copy_out = 1; do_escape = 1; } - kunmap_atomic(mapped_data); + kunmap_local(mapped_data); /* * Do we need to do a data copy? @@ -417,12 +416,10 @@ repeat: } jh_in->b_frozen_data = tmp; - mapped_data = kmap_atomic(new_page); - memcpy(tmp, mapped_data + new_offset, bh_in->b_size); - kunmap_atomic(mapped_data); + memcpy_from_folio(tmp, new_folio, new_offset, bh_in->b_size); - new_page = virt_to_page(tmp); - new_offset = offset_in_page(tmp); + new_folio = virt_to_folio(tmp); + new_offset = offset_in_folio(new_folio, tmp); done_copy_out = 1; /* @@ -438,12 +435,12 @@ repeat: * copying, we can finally do so. */ if (do_escape) { - mapped_data = kmap_atomic(new_page); - *((unsigned int *)(mapped_data + new_offset)) = 0; - kunmap_atomic(mapped_data); + mapped_data = kmap_local_folio(new_folio, new_offset); + *((unsigned int *)mapped_data) = 0; + kunmap_local(mapped_data); } - set_bh_page(new_bh, new_page, new_offset); + folio_set_bh(new_bh, new_folio, new_offset); new_bh->b_size = bh_in->b_size; new_bh->b_bdev = journal->j_dev; new_bh->b_blocknr = blocknr; |