forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
140 lines
2.6 KiB
C
140 lines
2.6 KiB
C
#ifndef _LINUX_MM_PAGE_IDLE_H
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#define _LINUX_MM_PAGE_IDLE_H
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#include <linux/bitops.h>
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#include <linux/page-flags.h>
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#include <linux/page_ext.h>
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#ifdef CONFIG_IDLE_PAGE_TRACKING
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#ifdef CONFIG_64BIT
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static inline bool page_is_young(struct page *page)
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{
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return PageYoung(page);
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}
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static inline void set_page_young(struct page *page)
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{
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SetPageYoung(page);
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}
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static inline bool test_and_clear_page_young(struct page *page)
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{
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return TestClearPageYoung(page);
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}
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static inline bool page_is_idle(struct page *page)
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{
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return PageIdle(page);
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}
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static inline void set_page_idle(struct page *page)
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{
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SetPageIdle(page);
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}
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static inline void clear_page_idle(struct page *page)
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{
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ClearPageIdle(page);
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}
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#else /* !CONFIG_64BIT */
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/*
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* If there is not enough space to store Idle and Young bits in page flags, use
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* page ext flags instead.
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*/
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extern struct page_ext_operations page_idle_ops;
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static inline bool page_is_young(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return false;
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return test_bit(PAGE_EXT_YOUNG, &page_ext->flags);
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}
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static inline void set_page_young(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return;
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set_bit(PAGE_EXT_YOUNG, &page_ext->flags);
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}
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static inline bool test_and_clear_page_young(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return false;
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return test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags);
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}
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static inline bool page_is_idle(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return false;
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return test_bit(PAGE_EXT_IDLE, &page_ext->flags);
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}
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static inline void set_page_idle(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return;
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set_bit(PAGE_EXT_IDLE, &page_ext->flags);
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}
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static inline void clear_page_idle(struct page *page)
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{
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struct page_ext *page_ext = lookup_page_ext(page);
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if (unlikely(!page_ext))
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return;
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clear_bit(PAGE_EXT_IDLE, &page_ext->flags);
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}
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#endif /* CONFIG_64BIT */
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#else /* !CONFIG_IDLE_PAGE_TRACKING */
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static inline bool page_is_young(struct page *page)
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{
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return false;
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}
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static inline void set_page_young(struct page *page)
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{
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}
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static inline bool test_and_clear_page_young(struct page *page)
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{
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return false;
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}
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static inline bool page_is_idle(struct page *page)
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{
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return false;
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}
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static inline void set_page_idle(struct page *page)
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{
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}
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static inline void clear_page_idle(struct page *page)
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{
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}
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#endif /* CONFIG_IDLE_PAGE_TRACKING */
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#endif /* _LINUX_MM_PAGE_IDLE_H */
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