jsauer/torvalds-linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-01-11 17:10:13 +00:00
Code

ext4: Use folio_next_pos()

Browse Source 
This is one instruction more efficient than open-coding folio_pos() +
folio_size().  It's the equivalent of (x + y) << z rather than
x << z + y << z.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20251024170822.1427218-5-willy@infradead.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: linux-ext4@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-10-24 18:08:12 +01:00 committed by Christian Brauner
parent 6870892b64
commit 4db47b2521
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/ext4/inode.c
View File

@ -1319,8 +1319,8 @@ retry_grab:
if (IS_ERR(folio))
return PTR_ERR(folio);
if (pos + len > folio_pos(folio) + folio_size(folio))
len = folio_pos(folio) + folio_size(folio) - pos;
if (len > folio_next_pos(folio) - pos)
len = folio_next_pos(folio) - pos;
from = offset_in_folio(folio, pos);
to = from + len;
@ -2704,7 +2704,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
if (mpd->map.m_len == 0)
mpd->start_pos = folio_pos(folio);
mpd->next_pos = folio_pos(folio) + folio_size(folio);
mpd->next_pos = folio_next_pos(folio);
/*
* Writeout when we cannot modify metadata is simple.
* Just submit the page. For data=journal mode we
@ -3146,8 +3146,8 @@ retry:
if (IS_ERR(folio))
return PTR_ERR(folio);
if (pos + len > folio_pos(folio) + folio_size(folio))
len = folio_pos(folio) + folio_size(folio) - pos;
if (len > folio_next_pos(folio) - pos)
len = folio_next_pos(folio) - pos;
ret = ext4_block_write_begin(NULL, folio, pos, len,
ext4_da_get_block_prep);