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mm: make some vars and functions static or __init

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"page_idle_ops" as a global var, but its scope of use within this
document.  So it should be static.

"page_ext_ops" is a var used in the kernel initial phase.  And other
functions are aslo used in the kernel initial phase.  So they should be
__init or __initdata to reclaim memory.

Link: https://lkml.kernel.org/r/20211217095023.67293-1-liuting.0x7c00@bytedance.com
Signed-off-by: Ting Liu <liuting.0x7c00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ting Liu 2022-01-14 14:09:28 -08:00 committed by Linus Torvalds
parent 0b8f0d8700
commit cab0a7c115
3 changed files with 4 additions and 5 deletions
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1
include/linux/page_idle.h
View File

@ -13,7 +13,6 @@
* If there is not enough space to store Idle and Young bits in page flags, use
* page ext flags instead.
*/
extern struct page_ext_operations page_idle_ops;
static inline bool folio_test_young(struct folio *folio)
{

4
mm/page_ext.c
View File

@ -64,12 +64,12 @@ static bool need_page_idle(void)
{
return true;
}
struct page_ext_operations page_idle_ops = {
static struct page_ext_operations page_idle_ops __initdata = {
.need = need_page_idle,
};
#endif
static struct page_ext_operations *page_ext_ops[] = {
static struct page_ext_operations *page_ext_ops[] __initdata = {
#ifdef CONFIG_PAGE_OWNER
&page_owner_ops,
#endif

4
mm/page_owner.c
View File

@ -46,7 +46,7 @@ static int __init early_page_owner_param(char *buf)
}
early_param("page_owner", early_page_owner_param);
static bool need_page_owner(void)
static __init bool need_page_owner(void)
{
return page_owner_enabled;
}
@ -75,7 +75,7 @@ static noinline void register_early_stack(void)
early_handle = create_dummy_stack();
}
static void init_page_owner(void)
static __init void init_page_owner(void)
{
if (!page_owner_enabled)
return;