mm/debug-pagealloc: add missing debug_pagealloc_enabled

Message ID
State New
Headers show

Commit Message

Arnd Bergmann Feb. 3, 2016, 10:15 p.m.
The change to move the pagealloc logic broke the slab allocator
check when it's disabled at compile time:

mm/slab.c: In function 'is_debug_pagealloc_cache':
mm/slab.c:1608:29: error: implicit declaration of function 'debug_pagealloc_enabled' [-Werror=implicit-function-declaration]

This adds an inline helper to get it to work again.

Signed-off-by: Arnd Bergmann <>

Fixes: 0a244aea1a61 ("mm/slab: clean up DEBUG_PAGEALLOC processing code")
 include/linux/mm.h | 1 +
 1 file changed, 1 insertion(+)



diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5d86eb2e8584..90d600ce56ad 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2242,6 +2242,7 @@  kernel_map_pages(struct page *page, int numpages, int enable)
 extern bool kernel_page_present(struct page *page);
+static inline bool debug_pagealloc_enabled(void) { return 0; }
 static inline void
 kernel_map_pages(struct page *page, int numpages, int enable) {}