linux-kernel - [PATCH v3 7/9] powerpc: Add stacktrace.h header

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Message-Id: <20180731145020.14009-8-muriloo@linux.ibm.com>
Date:   Tue, 31 Jul 2018 11:50:18 -0300
From:   Murilo Opsfelder Araujo <muriloo@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     "Alastair D'Silva" <alastair@...ilva.org>,
        Andrew Donnellan <andrew.donnellan@....ibm.com>,
        Balbir Singh <bsingharora@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@....fr>,
        Cyril Bur <cyrilbur@...il.com>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Joe Perches <joe@...ches.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michael Neuling <mikey@...ling.org>,
        Murilo Opsfelder Araujo <muriloo@...ux.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Paul Mackerras <paulus@...ba.org>,
        Simon Guo <wei.guo.simon@...il.com>,
        Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
        "Tobin C . Harding" <me@...in.cc>, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v3 7/9] powerpc: Add stacktrace.h header

Move show_instructions() declaration to
arch/powerpc/include/asm/stacktrace.h and include asm/stracktrace.h in
arch/powerpc/kernel/process.c, which contains the implementation.

This allows show_instructions() to be called on, for example,
show_signal_msg().

Signed-off-by: Murilo Opsfelder Araujo <muriloo@...ux.ibm.com>
---
 arch/powerpc/include/asm/stacktrace.h | 13 +++++++++++++
 arch/powerpc/kernel/process.c         |  3 ++-
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 arch/powerpc/include/asm/stacktrace.h

diff --git a/arch/powerpc/include/asm/stacktrace.h b/arch/powerpc/include/asm/stacktrace.h
new file mode 100644
index 000000000000..217ebc52ff97
--- /dev/null
+++ b/arch/powerpc/include/asm/stacktrace.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Stack trace functions.
+ *
+ * Copyright 2018, Murilo Opsfelder Araujo, IBM Corporation.
+ */
+
+#ifndef _ASM_POWERPC_STACKTRACE_H
+#define _ASM_POWERPC_STACKTRACE_H
+
+void show_instructions(struct pt_regs *regs);
+
+#endif /* _ASM_POWERPC_STACKTRACE_H */
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 50094c44bf79..e78799a8855a 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -52,6 +52,7 @@
 #include <asm/machdep.h>
 #include <asm/time.h>
 #include <asm/runlatch.h>
+#include <asm/stacktrace.h>
 #include <asm/syscalls.h>
 #include <asm/switch_to.h>
 #include <asm/tm.h>
@@ -1261,7 +1262,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
 
 static int instructions_to_print = 16;
 
-static void show_instructions(struct pt_regs *regs)
+void show_instructions(struct pt_regs *regs)
 {
 	int i;
 	unsigned long pc = regs->nip - (instructions_to_print * 3 / 4 *
-- 
2.17.1