[PATCH/RFC 1/3] mm: provide debug_pagealloc_enabled() without CONFIG_DEBUG_PAGEALLOC

[Christian Borntraeger]

We can provide debug_pagealloc_enabled() also if CONFIG_DEBUG_PAGEALLOC
is not set. It will return false in that case.

Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
 include/linux/mm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7783073..fbc5354 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2148,6 +2148,10 @@ kernel_map_pages(struct page *page, int numpages, int enable)
 extern bool kernel_page_present(struct page *page);
 #endif /* CONFIG_HIBERNATION */
 #else
+static inline bool debug_pagealloc_enabled(void)
+{
+	return false;
+}
 static inline void
 kernel_map_pages(struct page *page, int numpages, int enable) {}
 #ifdef CONFIG_HIBERNATION
-- 
2.3.0