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mm: convert do_swap_page() to use folio_free_swap()

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Also convert should_try_to_free_swap() to use a folio.  This removes a few
calls to compound_head().

Link: https://lkml.kernel.org/r/20220902194653.1739778-47-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) 2022-09-02 20:46:42 +01:00 committed by Andrew Morton
parent b4e6f66e45
commit a160e5377b
1 changed files with 8 additions and 8 deletions
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16
mm/memory.c
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@ -3641,14 +3641,14 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf)
return 0; return 0;
} }
static inline bool should_try_to_free_swap(struct page *page, static inline bool should_try_to_free_swap(struct folio *folio,
struct vm_area_struct *vma, struct vm_area_struct *vma,
unsigned int fault_flags) unsigned int fault_flags)
{ {
if (!PageSwapCache(page)) if (!folio_test_swapcache(folio))
return false; return false;
if (mem_cgroup_swap_full(page) || (vma->vm_flags & VM_LOCKED) || if (mem_cgroup_swap_full(&folio->page) || (vma->vm_flags & VM_LOCKED) ||
PageMlocked(page)) folio_test_mlocked(folio))
return true; return true;
/* /*
* If we want to map a page that's in the swapcache writable, we * If we want to map a page that's in the swapcache writable, we
@ -3656,8 +3656,8 @@ static inline bool should_try_to_free_swap(struct page *page,
* user. Try freeing the swapcache to get rid of the swapcache * user. Try freeing the swapcache to get rid of the swapcache
* reference only in case it's likely that we'll be the exlusive user. * reference only in case it's likely that we'll be the exlusive user.
*/ */
return (fault_flags & FAULT_FLAG_WRITE) && !PageKsm(page) && return (fault_flags & FAULT_FLAG_WRITE) && !folio_test_ksm(folio) &&
page_count(page) == 2; folio_ref_count(folio) == 2;
} }
static vm_fault_t pte_marker_clear(struct vm_fault *vmf) static vm_fault_t pte_marker_clear(struct vm_fault *vmf)
@ -3949,8 +3949,8 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
* yet. * yet.
*/ */
swap_free(entry); swap_free(entry);
if (should_try_to_free_swap(page, vma, vmf->flags)) if (should_try_to_free_swap(folio, vma, vmf->flags))
try_to_free_swap(page); folio_free_swap(folio);
inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES); inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
dec_mm_counter_fast(vma->vm_mm, MM_SWAPENTS); dec_mm_counter_fast(vma->vm_mm, MM_SWAPENTS);