From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: include/linux/page_ext.h: drop definition of unused PAGE_EXT_DEBUG_POISON
After bd33ef368135 ("mm: enable page poisoning early at boot")
PAGE_EXT_DEBUG_POISON is not longer used. Remove it.
Link: http://lkml.kernel.org/r/20180531135457.20167-2-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page_ext.h | 11 -----------
1 file changed, 11 deletions(-)
--- a/include/linux/page_ext.h~mm-page_ext-drop-definition-of-unused-page_ext_debug_poison
+++ a/include/linux/page_ext.h
@@ -16,18 +16,7 @@ struct page_ext_operations {
#ifdef CONFIG_PAGE_EXTENSION
-/*
- * page_ext->flags bits:
- *
- * PAGE_EXT_DEBUG_POISON is set for poisoned pages. This is used to
- * implement generic debug pagealloc feature. The pages are filled with
- * poison patterns and set this flag after free_pages(). The poisoned
- * pages are verified whether the patterns are not corrupted and clear
- * the flag before alloc_pages().
- */
-
enum page_ext_flags {
- PAGE_EXT_DEBUG_POISON, /* Page is poisoned */
PAGE_EXT_DEBUG_GUARD,
PAGE_EXT_OWNER,
#if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT)
_
