Commit 67311a36 authored Jul 17, 2023 by Kemeng Shi Committed by Andrew Morton Aug 21, 2023

mm/page_ext: move page_ext_operations definition under CONFIG_PAGE_EXTENSION

page_ext_operations should only be defined when CONFIG_PAGE_EXTENSION is
enabled.

Besides, this may detect missing reliance on CONFIG_PAGE_EXTENSION from
future Page Extension clients at compile time.

Link: https://lkml.kernel.org/r/20230717113227.1897173-4-shikemeng@huaweicloud.com


Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent c6493f4b

include/linux/page_ext.h

+1 −2

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@

		struct pglist_data;

		#ifdef CONFIG_PAGE_EXTENSION
		/**
		* struct page_ext_operations - per page_ext client operations
		* @offset: Offset to the client's data within page_ext. Offset is returned to
		@@ -29,8 +30,6 @@ struct page_ext_operations {
		bool need_shared_flags;
		};

		#ifdef CONFIG_PAGE_EXTENSION

		/*
		* The page_ext_flags users must set need_shared_flags to true.
		*/