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

From: kernel test robot
Date: Fri Jun 18 2021 - 07:50:08 EST

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@xxxxxxxxx>

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@xxxxxxxxxxxx

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