linux-kernel - [PATCH v2 2/2] arm64: mm: Use asid feature macro for cheanup

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Message-ID: <204aef78-cf5b-a337-af71-5d52ba845aa0@huawei.com>
Date:   Wed, 8 Dec 2021 17:17:45 +0800
From:   Yunfeng Ye <yeyunfeng@...wei.com>
To:     <catalin.marinas@....com>, <will@...nel.org>,
        <wangkefeng.wang@...wei.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <wuxu.wu@...wei.com>, Hewenliang <hewenliang4@...wei.com>
Subject: [PATCH v2 2/2] arm64: mm: Use asid feature macro for cheanup


The commit 95b54c3e4c92 ("KVM: arm64: Add feature register flag
definitions") introduce the ID_AA64MMFR0_ASID_8 and ID_AA64MMFR0_ASID_16
macros.

We can use these macros for cheanup in get_cpu_asid_bits().

No functional change.
---
 arch/arm64/mm/context.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index bbc2708fe928..b8b4cf0bcf39 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -50,10 +50,10 @@ static u32 get_cpu_asid_bits(void)
 		pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
 					smp_processor_id(),  fld);
 		fallthrough;
-	case 0:
+	case ID_AA64MMFR0_ASID_8:
 		asid = 8;
 		break;
-	case 2:
+	case ID_AA64MMFR0_ASID_16:
 		asid = 16;
 	}

-- 
2.27.0