systemtap test suite compilation failed: include/linux/sysfs.h:449:2: argument 2 of 'kernfs_find_and_get' differ in signedness

[Naresh Kamboju <naresh dot kamboju at linaro dot org>]

Hi,

The systemtap test suite compilation failed with below error.

ARCH: arm
---------------

kernel version: 3.14.0-linaro-arndale
systemtap location: /usr/local/bin/stap
systemtap version: version 2.5/0.158, commit
release-2.4-489-ge5fb7aeea34b + changes
gcc location: /usr/bin/gcc
gcc version: gcc (Ubuntu/Linaro 4.8.1-10ubuntu8) 4.8.1


**** failed systemtap kernel-devel smoke test:

Makefile:622: Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR:
-fstack-protector not supported by compiler
In file included from include/linux/kobject.h:21:0,
                 from include/linux/module.h:16,
                 from /usr/local/share/systemtap/runtime/linux/runtime.h:14,
                 from /usr/local/share/systemtap/runtime/runtime.h:24,
                 from
/tmp/stap5eHu9T/stap_bdd64b2c1a0e84441832fdc380015719_878_src.c:24:
include/linux/sysfs.h: In function 'sysfs_get_dirent':
include/linux/sysfs.h:449:2: error: pointer targets in passing
argument 2 of 'kernfs_find_and_get' differ in signedness
[-Werror=pointer-sign]
  return kernfs_find_and_get(parent, name);
  ^
In file included from include/linux/sysfs.h:15:0,
                 from include/linux/kobject.h:21,
                 from include/linux/module.h:16,
                 from /usr/local/share/systemtap/runtime/linux/runtime.h:14,
                 from /usr/local/share/systemtap/runtime/runtime.h:24,
                 from
/tmp/stap5eHu9T/stap_bdd64b2c1a0e84441832fdc380015719_878_src.c:24:
include/linux/kernfs.h:331:1: note: expected 'const char *' but
argument is of type 'const unsigned char *'
 kernfs_find_and_get(struct kernfs_node *kn, const char *name)
 ^
cc1: all warnings being treated as errors
make[4]: *** [/tmp/stap5eHu9T/stap_bdd64b2c1a0e84441832fdc380015719_878_src.o]
Error 1
make[3]: *** [_module_/tmp/stap5eHu9T] Error 2
WARNING: kbuild exited with status: 2
Pass 4: compilation failed.  [man error::pass4]

**** aborting testing.

make[2]: Leaving directory `/root/systemtap/testsuite'
if test -n ""; then mail  < systemtap.sum; fi
make[1]: Leaving directory `/root/systemtap/testsuite'

Please let me know if you need more information.

Best regards
Naresh Kamboju