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mm: remove page_ref_sub_return()

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With all callers converted to folios, we can act directly on
folio->_refcount.

Link: https://lkml.kernel.org/r/20240424191914.361554-5-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) 2024-04-24 20:19:09 +01:00 committed by Andrew Morton
parent 53e45c4f6d
commit 498aefbc69
1 changed files with 5 additions and 10 deletions
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15
include/linux/page_ref.h
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@ -139,18 +139,13 @@ static inline void folio_ref_sub(struct folio *folio, int nr)
page_ref_sub(&folio->page, nr);
}
static inline int page_ref_sub_return(struct page *page, int nr)
{
int ret = atomic_sub_return(nr, &page->_refcount);
if (page_ref_tracepoint_active(page_ref_mod_and_return))
__page_ref_mod_and_return(page, -nr, ret);
return ret;
}
static inline int folio_ref_sub_return(struct folio *folio, int nr)
{
return page_ref_sub_return(&folio->page, nr);
int ret = atomic_sub_return(nr, &folio->_refcount);
if (page_ref_tracepoint_active(page_ref_mod_and_return))
__page_ref_mod_and_return(&folio->page, -nr, ret);
return ret;
}
static inline void page_ref_inc(struct page *page)