From: Stephen Boyd <swboyd@xxxxxxxxxxxx> Subject: scripts/decode_stacktrace.sh: silence stderr messages from addr2line/nm Sometimes if you're using tools that have linked things improperly or have new features/sections that older tools don't expect you'll see warnings printed to stderr. We don't really care about these warnings, so let's just silence these messages to cleanup output of this script. Link: https://lkml.kernel.org/r/20210511003845.2429846-10-swboyd@xxxxxxxxxxxx Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Alexei Starovoitov <ast@xxxxxxxxxx> Cc: Jessica Yu <jeyu@xxxxxxxxxx> Cc: Evan Green <evgreen@xxxxxxxxxxxx> Cc: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx> Cc: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Cc: Sasha Levin <sashal@xxxxxxxxxx> Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Cc: Baoquan He <bhe@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Dave Young <dyoung@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Petr Mladek <pmladek@xxxxxxxx> Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Vivek Goyal <vgoyal@xxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- scripts/decode_stacktrace.sh | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/scripts/decode_stacktrace.sh~scripts-decode_stacktracesh-silence-stderr-messages-from-addr2line-nm +++ a/scripts/decode_stacktrace.sh @@ -74,7 +74,7 @@ find_module() { find_module && return if [[ $release == "" ]] ; then - release=$(gdb -ex 'print init_uts_ns.name.release' -ex 'quit' -quiet -batch "$vmlinux" | sed -n 's/\$1 = "\(.*\)".*/\1/p') + release=$(gdb -ex 'print init_uts_ns.name.release' -ex 'quit' -quiet -batch "$vmlinux" 2>/dev/null | sed -n 's/\$1 = "\(.*\)".*/\1/p') fi for dn in {/usr/lib/debug,}/lib/modules/$release ; do @@ -128,7 +128,7 @@ parse_symbol() { if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then local base_addr=${cache[$module,$name]} else - local base_addr=$(nm "$objfile" | awk '$3 == "'$name'" && ($2 == "t" || $2 == "T") {print $1; exit}') + local base_addr=$(nm "$objfile" 2>/dev/null | awk '$3 == "'$name'" && ($2 == "t" || $2 == "T") {print $1; exit}') if [[ $base_addr == "" ]] ; then # address not found return @@ -152,7 +152,7 @@ parse_symbol() { if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then local code=${cache[$module,$address]} else - local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address") + local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address" 2>/dev/null) cache[$module,$address]=$code fi _
