Re: [RFC PATCH 1/3] Introduce per thread user-kernel shared structure

[kernel test robot <lkp@intel.com>]

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Hi Prakash,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on linus/master]
[also build test ERROR on v5.14-rc7]
[cannot apply to tip/sched/core hnaz-linux-mm/master tip/x86/asm next-20210827]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Prakash-Sangappa/Provide-fast-access-to-thread-specific-data/20210828-073533
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8f9d0349841a2871624bb1e85309e03e9867c16e
config: nios2-defconfig (attached as .config)
compiler: nios2-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/4afb2fb1653308287e0f2347dfff5c499acedee7
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Prakash-Sangappa/Provide-fast-access-to-thread-specific-data/20210828-073533
        git checkout 4afb2fb1653308287e0f2347dfff5c499acedee7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nios2 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mm/task_shared.c: In function 'task_ushared_alloc':
   mm/task_shared.c:264:1: warning: label 'out' defined but not used [-Wunused-label]
     264 | out:
         | ^~~
   In file included from mm/task_shared.c:9:
   mm/task_shared.c: At top level:
>> include/linux/syscalls.h:241:25: error: conflicting types for 'sys_task_getshared'; have 'long int(u64,  u64,  void *)' {aka 'long int(long long unsigned int,  long long unsigned int,  void *)'}
     241 |         asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))       \
         |                         ^~~
   include/linux/syscalls.h:227:9: note: in expansion of macro '__SYSCALL_DEFINEx'
     227 |         __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
         |         ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:218:36: note: in expansion of macro 'SYSCALL_DEFINEx'
     218 | #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
         |                                    ^~~~~~~~~~~~~~~
   mm/task_shared.c:298:1: note: in expansion of macro 'SYSCALL_DEFINE3'
     298 | SYSCALL_DEFINE3(task_getshared, u64, opt, u64, flags, void __user *, uaddr)
         | ^~~~~~~~~~~~~~~
   In file included from mm/task_shared.c:9:
   include/linux/syscalls.h:1055:17: note: previous declaration of 'sys_task_getshared' with type 'long int(long int,  long int,  void *)'
    1055 | asmlinkage long sys_task_getshared(long opt, long flags, void __user *uaddr);
         |                 ^~~~~~~~~~~~~~~~~~


vim +241 include/linux/syscalls.h

1bd21c6c21e848 Dominik Brodowski   2018-04-05  230  
e145242ea0df6b Dominik Brodowski   2018-04-09  231  /*
e145242ea0df6b Dominik Brodowski   2018-04-09  232   * The asmlinkage stub is aliased to a function named __se_sys_*() which
e145242ea0df6b Dominik Brodowski   2018-04-09  233   * sign-extends 32-bit ints to longs whenever needed. The actual work is
e145242ea0df6b Dominik Brodowski   2018-04-09  234   * done within __do_sys_*().
e145242ea0df6b Dominik Brodowski   2018-04-09  235   */
1bd21c6c21e848 Dominik Brodowski   2018-04-05  236  #ifndef __SYSCALL_DEFINEx
bed1ffca022cc8 Frederic Weisbecker 2009-03-13  237  #define __SYSCALL_DEFINEx(x, name, ...)					\
bee20031772af3 Arnd Bergmann       2018-06-19  238  	__diag_push();							\
bee20031772af3 Arnd Bergmann       2018-06-19  239  	__diag_ignore(GCC, 8, "-Wattribute-alias",			\
bee20031772af3 Arnd Bergmann       2018-06-19  240  		      "Type aliasing is used to sanitize syscall arguments");\
83460ec8dcac14 Andi Kleen          2013-11-12 @241  	asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))	\
e145242ea0df6b Dominik Brodowski   2018-04-09  242  		__attribute__((alias(__stringify(__se_sys##name))));	\
c9a211951c7c79 Howard McLauchlan   2018-03-21  243  	ALLOW_ERROR_INJECTION(sys##name, ERRNO);			\
e145242ea0df6b Dominik Brodowski   2018-04-09  244  	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
e145242ea0df6b Dominik Brodowski   2018-04-09  245  	asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));	\
e145242ea0df6b Dominik Brodowski   2018-04-09  246  	asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))	\
1a94bc34768e46 Heiko Carstens      2009-01-14  247  	{								\
e145242ea0df6b Dominik Brodowski   2018-04-09  248  		long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\
07fe6e00f6cca6 Al Viro             2013-01-21  249  		__MAP(x,__SC_TEST,__VA_ARGS__);				\
2cf0966683430b Al Viro             2013-01-21  250  		__PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));	\
2cf0966683430b Al Viro             2013-01-21  251  		return ret;						\
1a94bc34768e46 Heiko Carstens      2009-01-14  252  	}								\
bee20031772af3 Arnd Bergmann       2018-06-19  253  	__diag_pop();							\
e145242ea0df6b Dominik Brodowski   2018-04-09  254  	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
1bd21c6c21e848 Dominik Brodowski   2018-04-05  255  #endif /* __SYSCALL_DEFINEx */
1a94bc34768e46 Heiko Carstens      2009-01-14  256  

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