Hi Fengguang, On 15 August 2016 at 21:03, kbuild test robot <l...@intel.com> wrote: > Hi Chunyan, > > [auto build test WARNING on linus/master] > [also build test WARNING on v4.8-rc2 next-20160815] > [cannot apply to linux/master] > [if your patch is applied to the wrong git tree, please drop us a note to > help improve the system] > > url: > https://github.com/0day-ci/linux/commits/Chunyan-Zhang/tracing-add-a-possibility-of-exporting-function-trace-to-other-places-instead-of-ring-buffer-only/20160815-195631 > reproduce: > # apt-get install sparse
It may be better to use the latest version of sparse, i.e. git clone git://git.kernel.org/pub/scm/devel/sparse/sparse.git and then build the source code according to the direction on the page https://kernelnewbies.org/Sparse Otherwise, would get the errors like below if I install sparse using apt-get install. ------------------------------------------------------- CHECK arch/x86/purgatory/purgatory.c No such file: asan-stack=1 scripts/Makefile.build:289: recipe for target 'arch/x86/purgatory/purgatory.o' failed make[1]: *** [arch/x86/purgatory/purgatory.o] Error 1 arch/x86/Makefile:195: recipe for target 'archprepare' failed make: *** [archprepare] Error 2 ------------------------------------------------------- Thanks, Chunyan > make ARCH=x86_64 allmodconfig > make C=1 CF=-D__CHECK_ENDIAN__ > > sparse warnings: (new ones prefixed by >>) > > include/linux/compiler.h:230:8: sparse: attribute 'no_sanitize_address': > unknown attribute >>> kernel/trace/trace.c:2173:23: sparse: incompatible types in comparison >>> expression (different address spaces) > kernel/trace/trace.c:2175:23: sparse: incompatible types in comparison > expression (different address spaces) > > vim +2173 kernel/trace/trace.c > > 2157 static DEFINE_MUTEX(trace_export_lock); > 2158 > 2159 static struct trace_export trace_export_rb __read_mostly = { > 2160 .name = "rb", > 2161 .commit = trace_rb_commit, > 2162 .next = NULL, > 2163 }; > 2164 static struct trace_export *trace_exports_list __read_mostly = > &trace_export_rb; > 2165 > 2166 inline void > 2167 trace_exports(struct trace_array *tr, struct ring_buffer_event *event) > 2168 { > 2169 struct trace_export *export; > 2170 > 2171 preempt_disable_notrace(); > 2172 >> 2173 for (export = rcu_dereference_raw_notrace(trace_exports_list); > 2174 export && export->commit; > 2175 export = rcu_dereference_raw_notrace(export->next)) { > 2176 tr->export = export; > 2177 export->commit(tr, event); > 2178 } > 2179 > 2180 preempt_enable_notrace(); > 2181 } > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation
