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jfs: Convert insert_metapage() to take a folio

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Both of its callers now have a folio, so convert this function.
Use folio_attach_private() instead of manually setting folio->private.
This also gets the expected refcount of the folio correct.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-04-17 18:56:48 +01:00 committed by Dave Kleikamp
parent 2dcd9630d9
commit 9346476d21
1 changed files with 13 additions and 18 deletions
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31
fs/jfs/jfs_metapage.c
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@ -87,25 +87,23 @@ static inline struct metapage *page_to_mp(struct page *page, int offset)
return mp_anchor(page)->mp[offset >> L2PSIZE];
}
static inline int insert_metapage(struct page *page, struct metapage *mp)
static inline int insert_metapage(struct folio *folio, struct metapage *mp)
{
struct meta_anchor *a;
int index;
int l2mp_blocks; /* log2 blocks per metapage */
if (PagePrivate(page))
a = mp_anchor(page);
else {
a = folio->private;
if (!a) {
a = kzalloc(sizeof(struct meta_anchor), GFP_NOFS);
if (!a)
return -ENOMEM;
set_page_private(page, (unsigned long)a);
SetPagePrivate(page);
kmap(page);
folio_attach_private(folio, a);
kmap(&folio->page);
}
if (mp) {
l2mp_blocks = L2PSIZE - page->mapping->host->i_blkbits;
l2mp_blocks = L2PSIZE - folio->mapping->host->i_blkbits;
index = (mp->index >> l2mp_blocks) & (MPS_PER_PAGE - 1);
a->mp_count++;
a->mp[index] = mp;
@ -127,8 +125,7 @@ static inline void remove_metapage(struct page *page, struct metapage *mp)
a->mp[index] = NULL;
if (--a->mp_count == 0) {
kfree(a);
set_page_private(page, 0);
ClearPagePrivate(page);
detach_page_private(page);
kunmap(page);
}
}
@ -150,20 +147,18 @@ static inline struct metapage *page_to_mp(struct page *page, int offset)
return PagePrivate(page) ? (struct metapage *)page_private(page) : NULL;
}
static inline int insert_metapage(struct page *page, struct metapage *mp)
static inline int insert_metapage(struct folio *folio, struct metapage *mp)
{
if (mp) {
set_page_private(page, (unsigned long)mp);
SetPagePrivate(page);
kmap(page);
folio_attach_private(folio, mp);
kmap(&folio->page);
}
return 0;
}
static inline void remove_metapage(struct page *page, struct metapage *mp)
{
set_page_private(page, 0);
ClearPagePrivate(page);
detach_page_private(page);
kunmap(page);
}
@ -496,7 +491,7 @@ static int metapage_read_folio(struct file *fp, struct folio *folio)
&xlen);
if (pblock) {
if (!folio->private)
insert_metapage(&folio->page, NULL);
insert_metapage(folio, NULL);
inc_io(&folio->page);
if (bio)
submit_bio(bio);
@ -658,7 +653,7 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
mp->logical_size = size;
mp->data = folio_address(folio) + page_offset;
mp->index = lblock;
if (unlikely(insert_metapage(&folio->page, mp))) {
if (unlikely(insert_metapage(folio, mp))) {
free_metapage(mp);
goto unlock;
}