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From: Stephen Boyd <swboyd@chromium.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	Jiri Olsa <jolsa@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
	Jessica Yu <jeyu@kernel.org>, Evan Green <evgreen@chromium.org>,
	Hsin-Yi Wang <hsinyi@chromium.org>,
	Petr Mladek <pmladek@suse.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Matthew Wilcox <willy@infradead.org>
Subject: [PATCH v3 05/12] arm64: stacktrace: Use %pSb for backtrace printing
Date: Tue, 30 Mar 2021 20:05:13 -0700	[thread overview]
Message-ID: <20210331030520.3816265-6-swboyd@chromium.org> (raw)
In-Reply-To: <20210331030520.3816265-1-swboyd@chromium.org>

Let's use the new printk format to print the stacktrace entry when
printing a backtrace to the kernel logs. This will include any module's
build ID[1] in it so that offline/crash debugging can easily locate the
debuginfo for a module via something like debuginfod[2].

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Evan Green <evgreen@chromium.org>
Cc: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Link: https://fedoraproject.org/wiki/Releases/FeatureBuildId [1]
Link: https://sourceware.org/elfutils/Debuginfod.html [2]
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 arch/arm64/kernel/stacktrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index ad20981dfda4..9d38da01ff98 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -129,7 +129,7 @@ NOKPROBE_SYMBOL(walk_stackframe);
 
 static void dump_backtrace_entry(unsigned long where, const char *loglvl)
 {
-	printk("%s %pS\n", loglvl, (void *)where);
+	printk("%s %pSb\n", loglvl, (void *)where);
 }
 
 void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
-- 
https://chromeos.dev


  parent reply	other threads:[~2021-03-31  3:06 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-31  3:05 [PATCH v3 00/12] Add build ID to stacktraces Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 01/12] buildid: Add API to parse build ID out of buffer Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 02/12] buildid: Stash away kernels build ID on init Stephen Boyd
2021-04-08 12:05   ` Jessica Yu
2021-04-08 18:52     ` Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 03/12] dump_stack: Add vmlinux build ID to stack traces Stephen Boyd
2021-04-07 13:42   ` Petr Mladek
2021-04-08  5:44     ` Stephen Boyd
2021-04-07 14:03   ` Petr Mladek
2021-04-08  1:14     ` Stephen Boyd
2021-04-08  6:20     ` Stephen Boyd
2021-04-08 10:13       ` Petr Mladek
2021-04-08 19:52         ` Stephen Boyd
2021-04-08 21:08           ` Stephen Boyd
2021-04-09  9:19           ` Petr Mladek
2021-03-31  3:05 ` [PATCH v3 04/12] module: Add printk format to add module build ID to stacktraces Stephen Boyd
2021-04-07 14:54   ` Petr Mladek
2021-04-07 15:07     ` Andy Shevchenko
2021-04-07 15:03   ` Petr Mladek
2021-04-07 15:37     ` Andy Shevchenko
2021-04-08  6:58     ` Stephen Boyd
2021-04-08 13:44   ` Jessica Yu
2021-04-08 14:05     ` Andy Shevchenko
2021-04-08 19:57       ` Stephen Boyd
2021-03-31  3:05 ` Stephen Boyd [this message]
2021-03-31  3:05 ` [PATCH v3 06/12] x86/dumpstack: Use %pSb for backtrace printing Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 07/12] scripts/decode_stacktrace.sh: Support debuginfod Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 08/12] scripts/decode_stacktrace.sh: Silence stderr messages from addr2line/nm Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 09/12] scripts/decode_stacktrace.sh: Indicate 'auto' can be used for base path Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 10/12] buildid: Mark some arguments const Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 11/12] buildid: Fix kernel-doc notation Stephen Boyd
2021-03-31  3:05 ` [PATCH v3 12/12] kdump: Use vmlinux_build_id to simplify Stephen Boyd
2021-04-07 17:03   ` Petr Mladek
2021-04-08  5:36     ` Stephen Boyd
2021-04-08 10:17     ` Baoquan He
2021-04-08 19:58       ` Stephen Boyd

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