From: Dave Kleikamp <dave.kleikamp@oracle.com>
Date: Thu, 4 Feb 2016 16:43:48 +0000 (-0600)
Subject: sparc64: call crash_kexec() directly from die_if_kernel()
X-Git-Tag: v4.1.12-92~147^2~3^2~1
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=954537138cf7b2ba7a55ad8f2b68fd00751b3ef1;p=users%2Fjedix%2Flinux-maple.git

sparc64: call crash_kexec() directly from die_if_kernel()

A direct call to crash_kexec() here allows the crashing register state
to be saved to the PT_NOTE. When called from panic(), a new register
state is created which is less useful.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
---

diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index d21cd625c0ded..6202f71767f5e 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -21,6 +21,7 @@
 #include <linux/reboot.h>
 #include <linux/gfp.h>
 #include <linux/context_tracking.h>
+#include <linux/kexec.h>
 
 #include <asm/smp.h>
 #include <asm/delay.h>
@@ -2386,6 +2387,8 @@ static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
 	return (struct reg_window *) (fp + STACK_BIAS);
 }
 
+static int crashing_cpu;
+
 void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
 {
 	static int die_counter;
@@ -2427,6 +2430,8 @@ void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
 		}
 		user_instruction_dump ((unsigned int __user *) regs->tpc);
 	}
+	crashing_cpu = smp_processor_id();
+	crash_kexec(regs);
 	if (panic_on_oops)
 		panic("Fatal exception");
 	if (regs->tstate & TSTATE_PRIV)