Em Tue, Feb 21, 2017 at 05:34:57PM +0200, Elena Reshetova escreveu:
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations.
Signed-off-by: Elena Reshetova elena.reshetova@intel.com Signed-off-by: Hans Liljestrand ishkamiel@gmail.com Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: David Windsor dwindsor@gmail.com
You are doing two things (well three) things here:
1. converting to refcnt.h
2. Initiationg the refcount to 1, which makes this take place:
[acme@jouet linux]$ m make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: arch/x86/include/asm/cpufeatures.h differs from kernel CC /tmp/build/perf/util/comm.o INSTALL trace_plugins util/comm.c:16:25: error: ‘comm_str__get’ defined but not used [-Werror=unused-function] static struct comm_str *comm_str__get(struct comm_str *cs) ^~~~~~~~~~~~~ cc1: all warnings being treated as errors mv: cannot stat '/tmp/build/perf/util/.comm.o.tmp': No such file or directory /home/acme/git/linux/tools/build/Makefile.build:101: recipe for target '/tmp/build/perf/util/comm.o' failed make[4]: *** [/tmp/build/perf/util/comm.o] Error 1 /home/acme/git/linux/tools/build/Makefile.build:144: recipe for target 'util' failed make[3]: *** [util] Error 2 Makefile.perf:523: recipe for target '/tmp/build/perf/libperf-in.o' failed make[2]: *** [/tmp/build/perf/libperf-in.o] Error 2 Makefile.perf:204: recipe for target 'sub-make' failed make[1]: *** [sub-make] Error 2 Makefile:108: recipe for target 'install-bin' failed make: *** [install-bin] Error 2 make: Leaving directory '/home/acme/git/linux/tools/perf' [acme@jouet linux]$
3) not test building your patches :-\
I'll let this pass this time, minor, I am removing the now unused comm_str__get() function.
- Arnaldo