diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 0a6dae2f2b84..2c2e98cae2d1 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2701,11 +2701,18 @@ static inline void kernel_poison_pages(struct page *page, int numpages, int enable) { } #endif -extern bool _debug_pagealloc_enabled; +#ifdef CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT +DECLARE_STATIC_KEY_TRUE(_debug_pagealloc_enabled); +#else +DECLARE_STATIC_KEY_FALSE(_debug_pagealloc_enabled); +#endif static inline bool debug_pagealloc_enabled(void) { - return IS_ENABLED(CONFIG_DEBUG_PAGEALLOC) && _debug_pagealloc_enabled; + if (!IS_ENABLED(CONFIG_DEBUG_PAGEALLOC)) + return false; + + return static_branch_unlikely(&_debug_pagealloc_enabled); } #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) @@ -2859,7 +2866,7 @@ extern struct page_ext_operations debug_guardpage_ops; #ifdef CONFIG_DEBUG_PAGEALLOC extern unsigned int _debug_guardpage_minorder; -extern bool _debug_guardpage_enabled; +DECLARE_STATIC_KEY_FALSE(_debug_guardpage_enabled); static inline unsigned int debug_guardpage_minorder(void) { @@ -2868,7 +2875,7 @@ static inline unsigned int debug_guardpage_minorder(void) static inline bool debug_guardpage_enabled(void) { - return _debug_guardpage_enabled; + return static_branch_unlikely(&_debug_guardpage_enabled); } static inline bool page_is_guard(struct page *page) |