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Tue, 01 Sep 2020 07:15:59 -0700 (PDT) From: Nicholas Piggin To: linux-arch@vger.kernel.org Cc: Nicholas Piggin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Arnd Bergmann , Vineet Gupta , linux-snps-arc@lists.infradead.org Subject: [PATCH v3 03/23] arc: use asm-generic/mmu_context.h for no-op implementations Date: Wed, 2 Sep 2020 00:15:19 +1000 Message-Id: <20200901141539.1757549-4-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200901141539.1757549-1-npiggin@gmail.com> References: <20200901141539.1757549-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arch-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Cc: Vineet Gupta Cc: linux-snps-arc@lists.infradead.org Signed-off-by: Nicholas Piggin --- Please ack or nack if you object to this being mered via Arnd's tree. arch/arc/include/asm/mmu_context.h | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/arch/arc/include/asm/mmu_context.h b/arch/arc/include/asm/mmu_context.h index 3a5e6a5b9ed6..df164066e172 100644 --- a/arch/arc/include/asm/mmu_context.h +++ b/arch/arc/include/asm/mmu_context.h @@ -102,6 +102,7 @@ static inline void get_new_mmu_context(struct mm_struct *mm) * Initialize the context related info for a new mm_struct * instance. */ +#define init_new_context init_new_context static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { @@ -113,6 +114,7 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm) return 0; } +#define destroy_context destroy_context static inline void destroy_context(struct mm_struct *mm) { unsigned long flags; @@ -153,13 +155,13 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, } /* - * Called at the time of execve() to get a new ASID - * Note the subtlety here: get_new_mmu_context() behaves differently here - * vs. in switch_mm(). Here it always returns a new ASID, because mm has - * an unallocated "initial" value, while in latter, it moves to a new ASID, - * only if it was unallocated + * activate_mm defaults (in asm-generic) to switch_mm and is called at the + * time of execve() to get a new ASID Note the subtlety here: + * get_new_mmu_context() behaves differently here vs. in switch_mm(). Here + * it always returns a new ASID, because mm has an unallocated "initial" + * value, while in latter, it moves to a new ASID, only if it was + * unallocated */ -#define activate_mm(prev, next) switch_mm(prev, next, NULL) /* it seemed that deactivate_mm( ) is a reasonable place to do book-keeping * for retiring-mm. However destroy_context( ) still needs to do that because @@ -168,8 +170,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, * there is a good chance that task gets sched-out/in, making it's ASID valid * again (this teased me for a whole day). */ -#define deactivate_mm(tsk, mm) do { } while (0) -#define enter_lazy_tlb(mm, tsk) +#include #endif /* __ASM_ARC_MMU_CONTEXT_H */ -- 2.23.0