From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
This patch separates code for zeroing memory from the code clearing tags
in post_alloc_hook().
This patch is not useful by itself but makes the simplifications in
the following patches easier to follow.
This patch does no functional changes.
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
---
mm/page_alloc.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f70bfa63a374..507004a54f2f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2405,19 +2405,21 @@ inline void post_alloc_hook(struct page *page, unsigned int order,
kasan_alloc_pages(page, order, gfp_flags);
} else {
bool init = !want_init_on_free() && want_init_on_alloc(gfp_flags);
+ bool init_tags = init && (gfp_flags & __GFP_ZEROTAGS);
kasan_unpoison_pages(page, order, init);
- if (init) {
- if (gfp_flags & __GFP_ZEROTAGS) {
- int i;
+ if (init_tags) {
+ int i;
- for (i = 0; i < 1 << order; i++)
- tag_clear_highpage(page + i);
- } else {
- kernel_init_free_pages(page, 1 << order);
- }
+ for (i = 0; i < 1 << order; i++)
+ tag_clear_highpage(page + i);
+
+ init = false;
}
+
+ if (init)
+ kernel_init_free_pages(page, 1 << order);
}
set_page_owner(page, order, gfp_flags);
--
2.25.1
