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mm: convert mem_cgroup_css_from_page() to mem_cgroup_css_from_folio()

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Only one caller doesn't have a folio, so move the page_folio() call to
that one caller from mem_cgroup_css_from_folio().

Link: https://lkml.kernel.org/r/20230116192507.2146150-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2023-01-16 19:25:07 +00:00
committed by Andrew Morton
parent 9cfb816b1c
commit 75376c6fb9
3 changed files with 10 additions and 10 deletions
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6
fs/fs-writeback.c
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@@ -246,7 +246,7 @@ void __inode_attach_wb(struct inode *inode, struct folio *folio)
struct cgroup_subsys_state *memcg_css;
if (folio) {
memcg_css = mem_cgroup_css_from_page(&folio->page);
memcg_css = mem_cgroup_css_from_folio(folio);
wb = wb_get_create(bdi, memcg_css, GFP_ATOMIC);
} else {
/* must pin memcg_css, see wb_get_create() */
@@ -859,6 +859,7 @@ EXPORT_SYMBOL_GPL(wbc_detach_inode);
void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page,
size_t bytes)
{
struct folio *folio;
struct cgroup_subsys_state *css;
int id;
@@ -871,7 +872,8 @@ void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page,
if (!wbc->wb || wbc->no_cgroup_owner)
return;
css = mem_cgroup_css_from_page(page);
folio = page_folio(page);
css = mem_cgroup_css_from_folio(folio);
/* dead cgroups shouldn't contribute to inode ownership arbitration */
if (!(css->flags & CSS_ONLINE))
return;