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


On 04/19/2014 02:53 PM, Naresh Kamboju wrote:
> Hi,
> 
> The systemtap test suite compilation failed with below error.

Hi,

On an ARM chromebook I have a linux kernel built from the mainline git repository (2.15.0-rc2) and the current version of systemtap checked out from the git repo. I am not seeing the error messages below. 

-Will

> 
> 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
> 


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