diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2022-03-24 18:10:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 19:06:46 -0700 |
| commit | b8491b9052fef036aac0ca3afc18ef223aef6f61 (patch) | |
| tree | f1bc789704015a61e6dd86553203e52439e76537 | |
| parent | 1c0e5b24f11707e8c8300060bfdd9ae4ae76611b (diff) | |
| download | linux-b8491b9052fef036aac0ca3afc18ef223aef6f61.tar.gz | |
kasan, page_alloc: refactor init checks in post_alloc_hook
Separate 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.
Link: https://lkml.kernel.org/r/2283fde963adfd8a2b29a92066f106cc16661a3c.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_alloc.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 94a220d661b14..d2d6e48d2d836 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2368,19 +2368,21 @@ 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); |