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authorTing Liu <liuting.0x7c00@bytedance.com>2022-01-14 14:09:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-15 16:30:31 +0200
commitcab0a7c115546a4865fb7439558af9077a569574 (patch)
tree103efc6cd003f560fcffbd2e7cbf9a56eeb54c70
parent0b8f0d870020dbd7037bfacbb73a9b3213470f90 (diff)
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@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>
-rw-r--r--include/linux/page_idle.h1
-rw-r--r--mm/page_ext.c4
-rw-r--r--mm/page_owner.c4
3 files changed, 4 insertions, 5 deletions
diff --git a/include/linux/page_idle.h b/include/linux/page_idle.h
index 83abf95e9fa7..4663dfed1293 100644
--- a/include/linux/page_idle.h
+++ b/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)
{
diff --git a/mm/page_ext.c b/mm/page_ext.c
index bee3240604dc..2e66d934d63f 100644
--- a/mm/page_ext.c
+++ b/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
diff --git a/mm/page_owner.c b/mm/page_owner.c
index 4f924957ce7a..5eea061bb1e5 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -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;