linux-kernel - [PATCH 02/15] riscv: use CSR_SATP instead of the legacy sptbr name in switch

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Message-Id: <20190813154747.24256-3-hch@lst.de>
Date:   Tue, 13 Aug 2019 17:47:34 +0200
From:   Christoph Hellwig <hch@....de>
To:     Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>
Cc:     Damien Le Moal <damien.lemoal@....com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Atish Patra <atish.patra@....com>
Subject: [PATCH 02/15] riscv: use CSR_SATP instead of the legacy sptbr name in switch_mm

Switch to our own constant for the satp register instead of using
the old name from a legacy version of the privileged spec.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Atish Patra <atish.patra@....com>
---
 arch/riscv/mm/context.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/riscv/mm/context.c b/arch/riscv/mm/context.c
index 89ceb3cbe218..beeb5d7f92ea 100644
--- a/arch/riscv/mm/context.c
+++ b/arch/riscv/mm/context.c
@@ -57,12 +57,7 @@ void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 	cpumask_clear_cpu(cpu, mm_cpumask(prev));
 	cpumask_set_cpu(cpu, mm_cpumask(next));
 
-	/*
-	 * Use the old spbtr name instead of using the current satp
-	 * name to support binutils 2.29 which doesn't know about the
-	 * privileged ISA 1.10 yet.
-	 */
-	csr_write(sptbr, virt_to_pfn(next->pgd) | SATP_MODE);
+	csr_write(CSR_SATP, virt_to_pfn(next->pgd) | SATP_MODE);
 	local_flush_tlb_all();
 
 	flush_icache_deferred(next);
-- 
2.20.1