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Usage -1 as argument count in syscallent tables
necessitates the check for it, a-la:
if (sysent[tcp->scno].nargs != -1)
tcp->u_nargs = sysent[tcp->scno].nargs;
else
tcp->u_nargs = MAX_ARGS;
which is stupid: we waste cycles checking something which
is constant and known at compile time.
* defs.h: Make struct sysent::nargs unsigned.
* freebsd/i386/syscallent.h: Replace nargs of -1 with MA.
* linux/s390/syscallent.h: Likewise.
* linux/s390x/syscallent.h: Likewise.
* svr4/syscallent.h: Likewise.
* freebsd/syscalls.pl: Likewise in generator script.
* syscallent.sh: Likewise in generator script.
* syscall.c: Add define MA MAX_ARGS / undef MA around includes
of syscallent[N].h.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
