arch/m32r/kernel/signal.c:106:2: error: implicit declaration of function 'sys_

Hi Al,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal.git master
head:   d38625a1fb0a7adcc79f97c37d3afde2981aa02a
commit: dc40dcb629a5a335d78997445d7bb3e5512af6ed [81/93] m32r: convert sigaltstack()
config: m32r-m32104ut_defconfig

All related error/warning messages:

arch/m32r/kernel/signal.c: In function 'sys_rt_sigreturn':
arch/m32r/kernel/signal.c:106:2: error: implicit declaration of function 'sys_sigaltstack' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

vim +106 arch/m32r/kernel/signal.c
100
101 set_current_blocked(&set);
102
103 if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
104 goto badframe;
105

107 goto badframe;
108
109 return result;

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0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu, Yuanhan Liu Intel Corporation