kasan: drop skip_kasan_poison variable in free_pages_prepare

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

Link: https://lkml.kernel.org/r/1d33212e79bc9ef0b4d3863f903875823e89046f.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Suggested-by: Marco Elver <elver@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@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>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3da959402db8a90a5f5ab82120799a23a31a6885..94a220d661b14cf4949f6c94bc29102df2bb9e86 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1297,7 +1297,6 @@ 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);
@@ -1371,7 +1370,7 @@ 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. */