arch/x86/lib/copy_mc.c:30:1: warning: no previous prototype for 'copy_mc_fragile_handle_tail'

kernel test robot
2021-06-09T22:43:59Z

[-- Attachment #1: Type: text/plain, Size: 2121 bytes --]

Hi Dan,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 368094df48e680fa51cedb68537408cfa64b788e
commit: ec6347bb43395cb92126788a1a5b25302543f815 x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
date: 8 months ago
config: x86_64-randconfig-r025-20210610 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec6347bb43395cb92126788a1a5b25302543f815
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ec6347bb43395cb92126788a1a5b25302543f815
# save the attached .config to linux build tree
make W=1 ARCH=x86_64

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

All warnings (new ones prefixed by >>):

>> arch/x86/lib/copy_mc.c:30:1: warning: no previous prototype for 'copy_mc_fragile_handle_tail' [-Wmissing-prototypes]
30 | copy_mc_fragile_handle_tail(char *to, char *from, unsigned len)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/copy_mc_fragile_handle_tail +30 arch/x86/lib/copy_mc.c

24
25 /*
26 * Similar to copy_user_handle_tail, probe for the write fault point, or
27 * source exception point.
28 */
29 __visible notrace unsigned long
> 30 copy_mc_fragile_handle_tail(char *to, char *from, unsigned len)
31 {
32 for (; len; --len, to++, from++)
33 if (copy_mc_fragile(to, from, 1))
34 break;
35 return len;
36 }
37 #else
38 /*
39 * No point in doing careful copying, or consulting a static key when
40 * there is no #MC handler in the CONFIG_X86_MCE=n case.
41 */
42 void enable_copy_mc_fragile(void)
43 {
44 }
45 #define copy_mc_fragile_enabled (0)
46 #endif
47

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

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 30945 bytes --]