Re: [PATCH v7 4/5] printk: Userspace format indexing support

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

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Hi Chris,

I love your patch! Yet something to improve:

[auto build test ERROR on jeyu/modules-next]
[also build test ERROR on linux/master soc/for-next openrisc/for-next powerpc/next uml/linux-next asm-generic/master driver-core/driver-core-testing linus/master v5.13-rc6 next-20210617]
[cannot apply to tip/x86/core]
[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/Chris-Down/printk-Userspace-format-indexing-support/20210617-101450
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git modules-next
config: ia64-randconfig-s031-20210618 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/819166a91ddffdbf04d0b4e6905a5ab3b568194f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chris-Down/printk-Userspace-format-indexing-support/20210617-101450
        git checkout 819166a91ddffdbf04d0b4e6905a5ab3b568194f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=ia64 

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 >>):

   In file included from include/linux/kernel.h:17,
                    from include/asm-generic/bug.h:20,
                    from arch/ia64/include/asm/bug.h:17,
                    from include/linux/bug.h:5,
                    from include/linux/page-flags.h:10,
                    from kernel/bounds.c:10:
>> include/linux/printk.h:219:5: error: static declaration of '_printk' follows non-static declaration
     219 | int _printk(const char *s, ...)
         |     ^~~~~~~
   In file included from arch/ia64/include/uapi/asm/intrinsics.h:22,
                    from arch/ia64/include/asm/intrinsics.h:11,
                    from arch/ia64/include/asm/bitops.h:19,
                    from include/linux/bitops.h:32,
                    from include/linux/kernel.h:12,
                    from include/asm-generic/bug.h:20,
                    from arch/ia64/include/asm/bug.h:17,
                    from include/linux/bug.h:5,
                    from include/linux/page-flags.h:10,
                    from kernel/bounds.c:10:
   arch/ia64/include/uapi/asm/cmpxchg.h:142:14: note: previous declaration of '_printk' was here
     142 |   extern int _printk(const char *fmt, ...);  \
         |              ^~~~~~~
   arch/ia64/include/asm/bitops.h:309:3: note: in expansion of macro 'CMPXCHG_BUGCHECK'
     309 |   CMPXCHG_BUGCHECK(m);
         |   ^~~~~~~~~~~~~~~~
--
   In file included from include/linux/kernel.h:17,
                    from include/asm-generic/bug.h:20,
                    from arch/ia64/include/asm/bug.h:17,
                    from include/linux/bug.h:5,
                    from include/linux/page-flags.h:10,
                    from kernel/bounds.c:10:
>> include/linux/printk.h:219:5: error: static declaration of '_printk' follows non-static declaration
     219 | int _printk(const char *s, ...)
         |     ^~~~~~~
   In file included from arch/ia64/include/uapi/asm/intrinsics.h:22,
                    from arch/ia64/include/asm/intrinsics.h:11,
                    from arch/ia64/include/asm/bitops.h:19,
                    from include/linux/bitops.h:32,
                    from include/linux/kernel.h:12,
                    from include/asm-generic/bug.h:20,
                    from arch/ia64/include/asm/bug.h:17,
                    from include/linux/bug.h:5,
                    from include/linux/page-flags.h:10,
                    from kernel/bounds.c:10:
   arch/ia64/include/uapi/asm/cmpxchg.h:142:14: note: previous declaration of '_printk' was here
     142 |   extern int _printk(const char *fmt, ...);  \
         |              ^~~~~~~
   arch/ia64/include/asm/bitops.h:309:3: note: in expansion of macro 'CMPXCHG_BUGCHECK'
     309 |   CMPXCHG_BUGCHECK(m);
         |   ^~~~~~~~~~~~~~~~
   make[2]: *** [scripts/Makefile.build:117: kernel/bounds.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1227: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:215: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/_printk +219 include/linux/printk.h

   201	
   202	char *log_buf_addr_get(void);
   203	u32 log_buf_len_get(void);
   204	void log_buf_vmcoreinfo_setup(void);
   205	void __init setup_log_buf(int early);
   206	__printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...);
   207	void dump_stack_print_info(const char *log_lvl);
   208	void show_regs_print_info(const char *log_lvl);
   209	extern asmlinkage void dump_stack(void) __cold;
   210	extern void printk_safe_flush(void);
   211	extern void printk_safe_flush_on_panic(void);
   212	#else
   213	static inline __printf(1, 0)
   214	int vprintk(const char *s, va_list args)
   215	{
   216		return 0;
   217	}
   218	static inline __printf(1, 2) __cold
 > 219	int _printk(const char *s, ...)
   220	{
   221		return 0;
   222	}
   223	static inline __printf(1, 2) __cold
   224	int _printk_deferred(const char *s, ...)
   225	{
   226		return 0;
   227	}
   228	static inline int printk_ratelimit(void)
   229	{
   230		return 0;
   231	}
   232	static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
   233						  unsigned int interval_msec)
   234	{
   235		return false;
   236	}
   237	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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