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mm/page_ext: move page_ext_operations definition under CONFIG_PAGE_EXTENSION

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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>
This commit is contained in:
Kemeng Shi 2023-07-17 19:32:27 +08:00 committed by Andrew Morton
parent c6493f4bd7
commit 67311a36e5
1 changed files with 1 additions and 2 deletions
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3
include/linux/page_ext.h
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@ -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.
*/