arch/mips/boot/compressed/uart-alchemy.c:4:6: warning: no previous prototype for 'putc'
From: kernel test robot
Date: Sun May 02 2021 - 21:51:02 EST
Hi Thomas,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9ccce092fc64d19504fa54de4fd659e279cc92e7
commit: 396c7d94c3bbe07ae00c9f694a5c731878843038 MIPS: alchemy: Fix build breakage, if TOUCHSCREEN_WM97XX is disabled
date: 7 months ago
config: mips-randconfig-r023-20210503 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=396c7d94c3bbe07ae00c9f694a5c731878843038
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 396c7d94c3bbe07ae00c9f694a5c731878843038
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
>> arch/mips/boot/compressed/uart-alchemy.c:4:6: warning: no previous prototype for 'putc' [-Wmissing-prototypes]
4 | void putc(char c)
| ^~~~
vim +/putc +4 arch/mips/boot/compressed/uart-alchemy.c
aae7e8da806e15 Manuel Lauss 2010-01-13 3
aae7e8da806e15 Manuel Lauss 2010-01-13 @4 void putc(char c)
:::::: The code at line 4 was first introduced by commit
:::::: aae7e8da806e1536fdee0632a40aaaeed97a2f1b MIPS: Alchemy: debug output for compressed kernels
:::::: TO: Manuel Lauss <manuel.lauss@xxxxxxxxxxxxxx>
:::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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