Robert
Here is the result:
---------
arch/s390/kernel/signal.c: while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
arch/s390/kernel/entry.S: .long sys_wait4
Binary file arch/s390/kernel/entry.o matches
Binary file arch/s390/kernel/signal.o matches
Binary file arch/s390/kernel/kernel.o matches
arch/s390x/kernel/signal32.c: while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
arch/s390x/kernel/signal.c: while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
arch/s390x/kernel/linux32.c: return sys_wait4(pid, stat_addr, options, NULL);
arch/s390x/kernel/linux32.c: ret = sys_wait4(pid, stat_addr ? &status : NULL,
options, &r);
arch/s390x/kernel/entry.S: .long SYSCALL(sys_wait4,sys32_wait4_wrapper)
---------
Quoting Roberto Nibali <ratz@xxxxxxxxxxxx>:
> I just do a wild guess, so could you please send me the output of:
>
> grep -ri sys_wait4 <where_you_kernel_src_resides>/linux/arch/s390*
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