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buffer_head: Remove b_page

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All users except bh_offset() have been converted to use b_folio instead.
Convert bh_offset() and remove b_page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Chao Shi <coshi036@gmail.com>
Acked-by: Weidong Zhu <weizhu@fiu.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/e9d168901578902bffe78ac8b5dfaf1210ee7fb3.1785951556.git.coshi036@gmail.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2026-08-06 12:58:24 -04:00 committed by Christian Brauner
parent cee9395acd
commit 1aeacc2cbf
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 2 additions and 5 deletions
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7
include/linux/buffer_head.h
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@ -59,10 +59,7 @@ struct address_space;
struct buffer_head {
unsigned long b_state; /* buffer state bitmap (see above) */
struct buffer_head *b_this_page;/* circular list of page's buffers */
union {
struct page *b_page; /* the page this bh is mapped to */
struct folio *b_folio; /* the folio this bh is mapped to */
};
struct folio *b_folio; /* the folio this bh is mapped to */
sector_t b_blocknr; /* start block number */
size_t b_size; /* size of mapping */
@ -172,7 +169,7 @@ static __always_inline int buffer_uptodate(const struct buffer_head *bh)
static inline unsigned long bh_offset(const struct buffer_head *bh)
{
return (unsigned long)(bh)->b_data & (page_size(bh->b_page) - 1);
return (unsigned long)(bh)->b_data & (folio_size(bh->b_folio) - 1);
}
/* If we *know* page->private refers to buffer_heads */