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From:   Eric Lin <tesheng@andestech.com>
To:     <linux-kernel@vger.kernel.org>, <linux-riscv@lists.infradead.org>,
        <walken@google.com>, <vbabka@suse.cz>, <peterx@redhat.com>,
        <akpm@linux-foundation.org>, <penberg@kernel.org>,
        <aou@eecs.berkeley.edu>, <palmer@dabbelt.com>,
        <paul.walmsley@sifive.com>, <hch@infradead.org>
CC:     Eric Lin <tesheng@andestech.com>, Alan Kao <alankao@andestech.com>
Subject: [PATCH v2 1/2] riscv/mm: Introduce a die_kernel_fault() helper function
Date:   Thu, 3 Dec 2020 14:48:25 +0800
Message-ID: <20201203064826.30832-2-tesheng@andestech.com>
In-Reply-To: <20201203064826.30832-1-tesheng@andestech.com>
References: <20201203064826.30832-1-tesheng@andestech.com>
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Like arm64, this patch adds a die_kernel_fault() helper
to ensure the same semantics for the different kernel faults.

Signed-off-by: Eric Lin <tesheng@andestech.com>
Cc: Alan Kao <alankao@andestech.com>
---
 arch/riscv/mm/fault.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 3c8b9e433c67..0bcfd0e1b39e 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -19,6 +19,19 @@
 
 #include "../kernel/head.h"
 
+static void die_kernel_fault(const char *msg, unsigned long addr,
+		struct pt_regs *regs)
+{
+	bust_spinlocks(1);
+
+	pr_alert("Unable to handle kernel %s at virtual address " REG_FMT "\n", msg,
+			addr);
+
+	bust_spinlocks(0);
+	die(regs, "Oops");
+	do_exit(SIGKILL);
+}
+
 static inline void no_context(struct pt_regs *regs, unsigned long addr)
 {
 	/* Are we prepared to handle this kernel fault? */
-- 
2.17.0