[PATCH] ARM: Fix null die() string for unhandled data and prefetch abort cases

From: "George G. Davis" <george_davis@mentor.com>
To: Russell King <linux@armlinux.org.uk>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Allison Randal <allison@lohutok.net>,
	"George G. Davis" <george_davis@mentor.com>,
	Souptick Joarder <jrdr.linux@gmail.com>,
	"moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
	open list <linux-kernel@vger.kernel.org>
Subject: [PATCH] ARM: Fix null die() string for unhandled data and prefetch abort cases
Date: Fri, 19 Jul 2019 22:32:55 -0400	[thread overview]
Message-ID: <1563589976-19004-1-git-send-email-george_davis@mentor.com> (raw)

When an unhandled data or prefetch abort occurs, the die() string
is empty resulting in backtrace messages similar to the following:

	Internal error: : 1 [#1] PREEMPT SMP ARM

Replace the null string with the name of the abort handler in order
to provide more meaningful hints as to the cause of the fault.

Signed-off-by: George G. Davis <george_davis@mentor.com>
---
 arch/arm/mm/fault.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 0048eadd0681..dddea0a21220 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -557,7 +557,7 @@ do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 		inf->name, fsr, addr);
 	show_pte(current->mm, addr);
 
-	arm_notify_die("", regs, inf->sig, inf->code, (void __user *)addr,
+	arm_notify_die(inf->name, regs, inf->sig, inf->code, (void __user *)addr,
 		       fsr, 0);
 }
 
@@ -585,7 +585,7 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs)
 	pr_alert("Unhandled prefetch abort: %s (0x%03x) at 0x%08lx\n",
 		inf->name, ifsr, addr);
 
-	arm_notify_die("", regs, inf->sig, inf->code, (void __user *)addr,
+	arm_notify_die(inf->name, regs, inf->sig, inf->code, (void __user *)addr,
 		       ifsr, 0);
 }
 
-- 
2.7.4

