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Wed, 23 Jun 2021 20:41:13 -0700 (PDT) Received: from localhost ([203.206.29.204]) by smtp.gmail.com with ESMTPSA id n69sm1160501pfd.132.2021.06.23.20.41.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jun 2021 20:41:13 -0700 (PDT) From: Daniel Axtens To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, elver@google.com, akpm@linux-foundation.org, andreyknvl@gmail.com Cc: linuxppc-dev@lists.ozlabs.org, christophe.leroy@csgroup.eu, aneesh.kumar@linux.ibm.com, bsingharora@gmail.com, Daniel Axtens Subject: [PATCH v16 4/4] kasan: use MAX_PTRS_PER_* for early shadow tables Date: Thu, 24 Jun 2021 13:40:50 +1000 Message-Id: <20210624034050.511391-5-dja@axtens.net> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210624034050.511391-1-dja@axtens.net> References: <20210624034050.511391-1-dja@axtens.net> MIME-Version: 1.0 Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=axtens.net header.s=google header.b=FooYSsrf; dmarc=none; spf=pass (imf14.hostedemail.com: domain of dja@axtens.net designates 209.85.215.178 as permitted sender) smtp.mailfrom=dja@axtens.net X-Rspamd-Server: rspam02 X-Stat-Signature: oh4b6dh69dze4pn7tue1w61783dqqqgo X-Rspamd-Queue-Id: 7C5A7C00CBD7 X-HE-Tag: 1624506074-182330 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: powerpc has a variable number of PTRS_PER_*, set at runtime based on the MMU that the kernel is booted under. This means the PTRS_PER_* are no longer constants, and therefore breaks the build. Switch to using MAX_PTRS_PER_*, which are constant. Suggested-by: Christophe Leroy Suggested-by: Balbir Singh Reviewed-by: Christophe Leroy Reviewed-by: Balbir Singh Reviewed-by: Marco Elver Reviewed-by: Andrey Konovalov Signed-off-by: Daniel Axtens --- include/linux/kasan.h | 6 +++--- mm/kasan/init.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 768d7d342757..5310e217bd74 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -41,9 +41,9 @@ struct kunit_kasan_expectation { #endif =20 extern unsigned char kasan_early_shadow_page[PAGE_SIZE]; -extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE + PTE_HWTABLE_PTRS]; -extern pmd_t kasan_early_shadow_pmd[PTRS_PER_PMD]; -extern pud_t kasan_early_shadow_pud[PTRS_PER_PUD]; +extern pte_t kasan_early_shadow_pte[MAX_PTRS_PER_PTE + PTE_HWTABLE_PTRS]= ; +extern pmd_t kasan_early_shadow_pmd[MAX_PTRS_PER_PMD]; +extern pud_t kasan_early_shadow_pud[MAX_PTRS_PER_PUD]; extern p4d_t kasan_early_shadow_p4d[MAX_PTRS_PER_P4D]; =20 int kasan_populate_early_shadow(const void *shadow_start, diff --git a/mm/kasan/init.c b/mm/kasan/init.c index 348f31d15a97..cc64ed6858c6 100644 --- a/mm/kasan/init.c +++ b/mm/kasan/init.c @@ -41,7 +41,7 @@ static inline bool kasan_p4d_table(pgd_t pgd) } #endif #if CONFIG_PGTABLE_LEVELS > 3 -pud_t kasan_early_shadow_pud[PTRS_PER_PUD] __page_aligned_bss; +pud_t kasan_early_shadow_pud[MAX_PTRS_PER_PUD] __page_aligned_bss; static inline bool kasan_pud_table(p4d_t p4d) { return p4d_page(p4d) =3D=3D virt_to_page(lm_alias(kasan_early_shadow_pu= d)); @@ -53,7 +53,7 @@ static inline bool kasan_pud_table(p4d_t p4d) } #endif #if CONFIG_PGTABLE_LEVELS > 2 -pmd_t kasan_early_shadow_pmd[PTRS_PER_PMD] __page_aligned_bss; +pmd_t kasan_early_shadow_pmd[MAX_PTRS_PER_PMD] __page_aligned_bss; static inline bool kasan_pmd_table(pud_t pud) { return pud_page(pud) =3D=3D virt_to_page(lm_alias(kasan_early_shadow_pm= d)); @@ -64,7 +64,7 @@ static inline bool kasan_pmd_table(pud_t pud) return false; } #endif -pte_t kasan_early_shadow_pte[PTRS_PER_PTE + PTE_HWTABLE_PTRS] +pte_t kasan_early_shadow_pte[MAX_PTRS_PER_PTE + PTE_HWTABLE_PTRS] __page_aligned_bss; =20 static inline bool kasan_pte_table(pmd_t pmd) --=20 2.30.2