linux-kernel - [PATCH v6 06/39] kasan: drop skip_kasan_poison variable in free_pages

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Message-Id: <1d33212e79bc9ef0b4d3863f903875823e89046f.1643047180.git.andreyknvl@google.com>
Date:   Mon, 24 Jan 2022 19:02:14 +0100
From:   andrey.konovalov@...ux.dev
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Marco Elver <elver@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Peter Collingbourne <pcc@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH v6 06/39] kasan: drop skip_kasan_poison variable in free_pages_prepare

From: Andrey Konovalov <andreyknvl@...gle.com>

skip_kasan_poison is only used in a single place.
Call should_skip_kasan_poison() directly for simplicity.

Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
Suggested-by: Marco Elver <elver@...gle.com>

---

Changes v1->v2:
- Add this patch.
---
 mm/page_alloc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f994fd68e3b1..8481420d2502 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1301,7 +1301,6 @@ static __always_inline bool free_pages_prepare(struct page *page,
 			unsigned int order, bool check_free, fpi_t fpi_flags)
 {
 	int bad = 0;
-	bool skip_kasan_poison = should_skip_kasan_poison(page, fpi_flags);
 	bool init = want_init_on_free();
 
 	VM_BUG_ON_PAGE(PageTail(page), page);
@@ -1375,7 +1374,7 @@ static __always_inline bool free_pages_prepare(struct page *page,
 	 * With hardware tag-based KASAN, memory tags must be set before the
 	 * page becomes unavailable via debug_pagealloc or arch_free_page.
 	 */
-	if (!skip_kasan_poison) {
+	if (!should_skip_kasan_poison(page, fpi_flags)) {
 		kasan_poison_pages(page, order, init);
 
 		/* Memory is already initialized if KASAN did it internally. */
-- 
2.25.1