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mm: remove PageKsm() 

All callers have been converted to use folio_test_ksm() or
PageAnonNotKsm(), so we can remove this wrapper.

Link: https://lkml.kernel.org/r/20241002152533.1350629-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Alex Shi <alexs@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-10-02 16:25:31 +01:00 committed by Andrew Morton
parent b33cc96c70
commit b9a256352f
3 changed files with 4 additions and 9 deletions
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7
include/linux/page-flags.h
View File

@ -725,13 +725,8 @@ static __always_inline bool folio_test_ksm(const struct folio *folio)
return ((unsigned long)folio->mapping & PAGE_MAPPING_FLAGS) ==
PAGE_MAPPING_KSM;
}
static __always_inline bool PageKsm(const struct page *page)
{
return folio_test_ksm(page_folio(page));
}
#else
TESTPAGEFLAG_FALSE(Ksm, ksm)
FOLIO_TEST_FLAG_FALSE(ksm)
#endif
u64 stable_page_flags(const struct page *page);

2
mm/internal.h
View File

@ -1356,7 +1356,7 @@ static inline bool gup_must_unshare(struct vm_area_struct *vma,
smp_rmb();
/*
* Note that PageKsm() pages cannot be exclusive, and consequently,
* Note that KSM pages cannot be exclusive, and consequently,
* cannot get pinned.
*/
return !PageAnonExclusive(page);

4
mm/ksm.c
View File

@ -656,7 +656,7 @@ static int break_ksm(struct vm_area_struct *vma, unsigned long addr, bool lock_v
*
* VM_FAULT_SIGBUS could occur if we race with truncation of the
* backing file, which also invalidates anonymous pages: that's
* okay, that truncation will have unmapped the PageKsm for us.
* okay, that truncation will have unmapped the KSM page for us.
*
* VM_FAULT_OOM: at the time of writing (late July 2009), setting
* aside mem_cgroup limits, VM_FAULT_OOM would only be set if the
@ -1434,7 +1434,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
* try_to_merge_one_page - take two pages and merge them into one
* @vma: the vma that holds the pte pointing to page
* @page: the PageAnon page that we want to replace with kpage
* @kpage: the PageKsm page that we want to map instead of page,
* @kpage: the KSM page that we want to map instead of page,
* or NULL the first time when we want to use page as kpage.
*
* This function returns 0 if the pages were merged, -EFAULT otherwise.