From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balbir Singh Subject: Re: [PATCH v2 2/4] kasan: use MAX_PTRS_PER_* for early shadow Date: Tue, 10 Dec 2019 20:36:24 +1100 Message-ID: References: <20191210044714.27265-1-dja@axtens.net> <20191210044714.27265-3-dja@axtens.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20191210044714.27265-3-dja@axtens.net> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Daniel Axtens , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kasan-dev@googlegroups.com, christophe.leroy@c-s.fr, aneesh.kumar@linux.ibm.com List-Id: linux-arch.vger.kernel.org On 10/12/19 3:47 pm, Daniel Axtens wrote: > This helps with powerpc support, and should have no effect on > anything else. > > Suggested-by: Christophe Leroy > Signed-off-by: Daniel Axtens If you follow the recommendations by Christophe and I, you don't need this patch Balbir Singh. > --- > 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 e18fe54969e9..d2f2a4ffcb12 100644 > --- a/include/linux/kasan.h > +++ b/include/linux/kasan.h > @@ -15,9 +15,9 @@ struct task_struct; > #include > > extern unsigned char kasan_early_shadow_page[PAGE_SIZE]; > -extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE]; > -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]; > +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]; > > int kasan_populate_early_shadow(const void *shadow_start, > diff --git a/mm/kasan/init.c b/mm/kasan/init.c > index ce45c491ebcd..8b54a96d3b3e 100644 > --- a/mm/kasan/init.c > +++ b/mm/kasan/init.c > @@ -46,7 +46,7 @@ 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) == virt_to_page(lm_alias(kasan_early_shadow_pud)); > @@ -58,7 +58,7 @@ 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) == virt_to_page(lm_alias(kasan_early_shadow_pmd)); > @@ -69,7 +69,7 @@ static inline bool kasan_pmd_table(pud_t pud) > return false; > } > #endif > -pte_t kasan_early_shadow_pte[PTRS_PER_PTE] __page_aligned_bss; > +pte_t kasan_early_shadow_pte[MAX_PTRS_PER_PTE] __page_aligned_bss; > > static inline bool kasan_pte_table(pmd_t pmd) > { > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-f196.google.com ([209.85.208.196]:45078 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727007AbfLJJge (ORCPT ); Tue, 10 Dec 2019 04:36:34 -0500 Subject: Re: [PATCH v2 2/4] kasan: use MAX_PTRS_PER_* for early shadow References: <20191210044714.27265-1-dja@axtens.net> <20191210044714.27265-3-dja@axtens.net> From: Balbir Singh Message-ID: Date: Tue, 10 Dec 2019 20:36:24 +1100 MIME-Version: 1.0 In-Reply-To: <20191210044714.27265-3-dja@axtens.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: Daniel Axtens , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kasan-dev@googlegroups.com, christophe.leroy@c-s.fr, aneesh.kumar@linux.ibm.com Message-ID: <20191210093624.YO8fElRGUrS9EhRP2gSXHD8Tn9jD_2k7zLt4vEQQlLs@z> On 10/12/19 3:47 pm, Daniel Axtens wrote: > This helps with powerpc support, and should have no effect on > anything else. > > Suggested-by: Christophe Leroy > Signed-off-by: Daniel Axtens If you follow the recommendations by Christophe and I, you don't need this patch Balbir Singh. > --- > 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 e18fe54969e9..d2f2a4ffcb12 100644 > --- a/include/linux/kasan.h > +++ b/include/linux/kasan.h > @@ -15,9 +15,9 @@ struct task_struct; > #include > > extern unsigned char kasan_early_shadow_page[PAGE_SIZE]; > -extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE]; > -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]; > +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]; > > int kasan_populate_early_shadow(const void *shadow_start, > diff --git a/mm/kasan/init.c b/mm/kasan/init.c > index ce45c491ebcd..8b54a96d3b3e 100644 > --- a/mm/kasan/init.c > +++ b/mm/kasan/init.c > @@ -46,7 +46,7 @@ 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) == virt_to_page(lm_alias(kasan_early_shadow_pud)); > @@ -58,7 +58,7 @@ 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) == virt_to_page(lm_alias(kasan_early_shadow_pmd)); > @@ -69,7 +69,7 @@ static inline bool kasan_pmd_table(pud_t pud) > return false; > } > #endif > -pte_t kasan_early_shadow_pte[PTRS_PER_PTE] __page_aligned_bss; > +pte_t kasan_early_shadow_pte[MAX_PTRS_PER_PTE] __page_aligned_bss; > > static inline bool kasan_pte_table(pmd_t pmd) > { >