[patch 119/146] mm: make some vars and functions static or __init

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Ting Liu <liuting.0x7c00@xxxxxxxxxxxxx>
Subject: mm: make some vars and functions static or __init

"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@xxxxxxxxxxxxx
Signed-off-by: Ting Liu <liuting.0x7c00@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/page_idle.h |    1 -
 mm/page_ext.c             |    4 ++--
 mm/page_owner.c           |    4 ++--
 3 files changed, 4 insertions(+), 5 deletions(-)

--- a/include/linux/page_idle.h~mm-make-some-vars-and-functions-static-or-__init
+++ a/include/linux/page_idle.h
@@ -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)
 {
--- a/mm/page_ext.c~mm-make-some-vars-and-functions-static-or-__init
+++ a/mm/page_ext.c
@@ -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
--- a/mm/page_owner.c~mm-make-some-vars-and-functions-static-or-__init
+++ a/mm/page_owner.c
@@ -46,7 +46,7 @@ static int __init early_page_owner_param
 }
 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_stac
 	early_handle = create_dummy_stack();
 }
 
-static void init_page_owner(void)
+static __init void init_page_owner(void)
 {
 	if (!page_owner_enabled)
 		return;
_



[Index of Archives]     [Kernel Archive]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]

  Powered by Linux