[v6,11/13] riscv: mm: Make asid_bits a local variable

Message ID	20240327045035.368512-12-samuel.holland@sifive.com (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: Samuel Holland <samuel.holland@sifive.com> To: Palmer Dabbelt <palmer@dabbelt.com>, linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexandre Ghiti <alexghiti@rivosinc.com>, Jisheng Zhang <jszhang@kernel.org>, Yunhui Cui <cuiyunhui@bytedance.com>, Samuel Holland <samuel.holland@sifive.com> Subject: [PATCH v6 11/13] riscv: mm: Make asid_bits a local variable Date: Tue, 26 Mar 2024 21:49:52 -0700 Message-ID: <20240327045035.368512-12-samuel.holland@sifive.com> In-Reply-To: <20240327045035.368512-1-samuel.holland@sifive.com> References: <20240327045035.368512-1-samuel.holland@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	riscv: ASID-related and UP-related TLB flush enhancements \| expand [v6,00/13] riscv: ASID-related and UP-related TLB flush enhancements [v6,01/13] riscv: Flush the instruction cache during SMP bringup [v6,02/13] riscv: Factor out page table TLB synchronization [v6,03/13] riscv: Use IPIs for remote cache/TLB flushes by default [v6,04/13] riscv: mm: Broadcast kernel TLB flushes only when needed [v6,05/13] riscv: Only send remote fences when some other CPU is online [v6,06/13] riscv: mm: Combine the SMP and UP TLB flush code [v6,07/13] riscv: Apply SiFive CIP-1200 workaround to single-ASID sfence.vma [v6,08/13] riscv: Avoid TLB flush loops when affected by SiFive CIP-1200 [v6,09/13] riscv: mm: Introduce cntx2asid/cntx2version helper macros [v6,10/13] riscv: mm: Use a fixed layout for the MM context ID [v6,11/13] riscv: mm: Make asid_bits a local variable [v6,12/13] riscv: mm: Preserve global TLB entries when switching contexts [v6,13/13] riscv: mm: Always use an ASID to flush mm contexts

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20240327045035.368512-12-samuel.holland@sifive.com (mailing list archive)

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From: Samuel Holland <samuel.holland@sifive.com>
To: Palmer Dabbelt <palmer@dabbelt.com>,
	linux-riscv@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
	linux-mm@kvack.org,
	Alexandre Ghiti <alexghiti@rivosinc.com>,
	Jisheng Zhang <jszhang@kernel.org>,
	Yunhui Cui <cuiyunhui@bytedance.com>,
	Samuel Holland <samuel.holland@sifive.com>
Subject: [PATCH v6 11/13] riscv: mm: Make asid_bits a local variable
Date: Tue, 26 Mar 2024 21:49:52 -0700
Message-ID: <20240327045035.368512-12-samuel.holland@sifive.com>
In-Reply-To: <20240327045035.368512-1-samuel.holland@sifive.com>
References: <20240327045035.368512-1-samuel.holland@sifive.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: owner-linux-mm@kvack.org
Precedence: bulk

Series

Commit Message

Samuel Holland March 27, 2024, 4:49 a.m. UTC

This variable is only used inside asids_init().

Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

(no changes since v1)

 arch/riscv/mm/context.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/riscv/mm/context.c b/arch/riscv/mm/context.c
index 5315af06cd4d..0bf6d0070a14 100644
--- a/arch/riscv/mm/context.c
+++ b/arch/riscv/mm/context.c
@@ -20,7 +20,6 @@ 
 
 DEFINE_STATIC_KEY_FALSE(use_asid_allocator);
 
-static unsigned long asid_bits;
 static unsigned long num_asids;
 
 static atomic_long_t current_version;
@@ -226,7 +225,7 @@  static inline void set_mm(struct mm_struct *prev,
 
 static int __init asids_init(void)
 {
-	unsigned long old;
+	unsigned long asid_bits, old;
 
 	/* Figure-out number of ASID bits in HW */
 	old = csr_read(CSR_SATP);

[v6,11/13] riscv: mm: Make asid_bits a local variable

Commit Message

Patch