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Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h15
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)