4.9-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit da15fc2fa9c07b23db8f5e479bd8a9f0d741ca07 ]
The Yocto build system does a 'make clean' when rebuilding due to changed dependencies, and that consistently fails for me (causing the whole BSP build to fail) with errors such as
| find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: find: '[...]/perf/1.0-r9/perf-1.0/libtraceevent.a''[...]/perf/1.0-r9/perf-1.0/libtraceevent.a': No such file or directory: No such file or directory | [...] | find: cannot delete '/mnt/xfs/devel/pil/yocto/tmp-glibc/work/wandboard-oe-linux-gnueabi/perf/1.0-r9/perf-1.0/util/.pstack.o.cmd': No such file or directory
Apparently (despite the comment), 'make clean' ends up launching multiple sub-makes that all want to remove the same things - perhaps this only happens in combination with a O=... parameter. In any case, we don't lose much by explicitly disabling the parallelism for the clean target, and it makes automated builds much more reliable.
Signed-off-by: Rasmus Villemoes linux@rasmusvillemoes.dk Acked-by: Jiri Olsa jolsa@kernel.org Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/20180705131527.19749-1-linux@rasmusvillemoes.dk Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -83,10 +83,10 @@ endif # has_clean endif # MAKECMDGOALS
# -# The clean target is not really parallel, don't print the jobs info: +# Explicitly disable parallelism for the clean target. # clean: - $(make) + $(make) -j1
# # The build-test target is not really parallel, don't print the jobs info,