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mm: fix page_freeze_refs and page_unfreeze_refs in comments
page_freeze_refs/page_unfreeze_refs have already been relplaced by page_ref_freeze/page_ref_unfreeze , but they are not modified in the comments. Link: http://lkml.kernel.org/r/1532590226-106038-1-git-send-email-jiang.biao2@zte.com.cn Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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4
mm/ksm.c
4
mm/ksm.c
@ -703,7 +703,7 @@ static struct page *get_ksm_page(struct stable_node *stable_node, bool lock_it)
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* We cannot do anything with the page while its refcount is 0.
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* Usually 0 means free, or tail of a higher-order page: in which
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* case this node is no longer referenced, and should be freed;
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* however, it might mean that the page is under page_freeze_refs().
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* however, it might mean that the page is under page_ref_freeze().
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* The __remove_mapping() case is easy, again the node is now stale;
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* but if page is swapcache in migrate_page_move_mapping(), it might
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* still be our page, in which case it's essential to keep the node.
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@ -714,7 +714,7 @@ static struct page *get_ksm_page(struct stable_node *stable_node, bool lock_it)
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* work here too. We have chosen the !PageSwapCache test to
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* optimize the common case, when the page is or is about to
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* be freed: PageSwapCache is cleared (under spin_lock_irq)
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* in the freeze_refs section of __remove_mapping(); but Anon
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* in the ref_freeze section of __remove_mapping(); but Anon
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* page->mapping reset to NULL later, in free_pages_prepare().
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*/
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if (!PageSwapCache(page))
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@ -1167,7 +1167,7 @@ int memory_failure(unsigned long pfn, int flags)
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* R/W the page; let's pray that the page has been
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* used and will be freed some time later.
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* In fact it's dangerous to directly bump up page count from 0,
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* that may make page_freeze_refs()/page_unfreeze_refs() mismatch.
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* that may make page_ref_freeze()/page_ref_unfreeze() mismatch.
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*/
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if (!(flags & MF_COUNT_INCREASED) && !get_hwpoison_page(p)) {
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if (is_free_buddy_page(p)) {
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@ -903,7 +903,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
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refcount = 2;
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if (!page_ref_freeze(page, refcount))
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goto cannot_free;
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/* note: atomic_cmpxchg in page_freeze_refs provides the smp_rmb */
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/* note: atomic_cmpxchg in page_ref_freeze provides the smp_rmb */
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if (unlikely(PageDirty(page))) {
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page_ref_unfreeze(page, refcount);
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goto cannot_free;
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