[MIPS] Run checksyscalls for N32 and O32 ABI

On 64-bit MIPS, only N64 ABI is checked by default.  This patch adds
some rules for other ABIs.  This results in these warnings at the
moment:

  CALL-N32 /home/git/linux-mips/scripts/checksyscalls.sh
<stdin>:148:2: warning: #warning syscall time not implemented
<stdin>:424:2: warning: #warning syscall select not implemented
<stdin>:440:2: warning: #warning syscall uselib not implemented
<stdin>:856:2: warning: #warning syscall vfork not implemented
<stdin>:868:2: warning: #warning syscall truncate64 not implemented
<stdin>:872:2: warning: #warning syscall ftruncate64 not implemented
<stdin>:876:2: warning: #warning syscall stat64 not implemented
<stdin>:880:2: warning: #warning syscall lstat64 not implemented
<stdin>:884:2: warning: #warning syscall fstat64 not implemented
<stdin>:980:2: warning: #warning syscall getdents64 not implemented
<stdin>:1176:2: warning: #warning syscall fadvise64_64 not implemented
<stdin>:1284:2: warning: #warning syscall fstatat64 not implemented
<stdin>:1364:2: warning: #warning syscall utimensat not implemented
  CALL-O32 /home/git/linux-mips/scripts/checksyscalls.sh
<stdin>:424:2: warning: #warning syscall select not implemented
<stdin>:856:2: warning: #warning syscall vfork not implemented
<stdin>:1176:2: warning: #warning syscall fadvise64_64 not implemented
<stdin>:1364:2: warning: #warning syscall utimensat not implemented
  CALL    /home/git/linux-mips/scripts/checksyscalls.sh
<stdin>:148:2: warning: #warning syscall time not implemented
<stdin>:424:2: warning: #warning syscall select not implemented
<stdin>:440:2: warning: #warning syscall uselib not implemented
<stdin>:856:2: warning: #warning syscall vfork not implemented
<stdin>:980:2: warning: #warning syscall getdents64 not implemented
<stdin>:1364:2: warning: #warning syscall utimensat not implemented

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Makefile

@@ -709,3 +709,25 @@ archclean:
 CLEAN_FILES += vmlinux.32 \
 	       vmlinux.64 \
 	       vmlinux.ecoff
+
+quiet_cmd_syscalls_n32 = CALL-N32 $<
+      cmd_syscalls_n32 = $(CONFIG_SHELL) $< $(CC) $(c_flags) -mabi=n32
+
+quiet_cmd_syscalls_o32 = CALL-O32 $<
+      cmd_syscalls_o32 = $(CONFIG_SHELL) $< $(CC) $(c_flags) -mabi=32
+
+PHONY += missing-syscalls-n32 missing-syscalls-o32
+
+missing-syscalls-n32: scripts/checksyscalls.sh FORCE
+	$(call cmd,syscalls_n32)
+
+missing-syscalls-o32: scripts/checksyscalls.sh FORCE
+	$(call cmd,syscalls_o32)
+
+archprepare:
+ifdef CONFIG_MIPS32_N32
+	$(Q)$(MAKE) $(build)=arch/mips missing-syscalls-n32
+endif
+ifdef CONFIG_MIPS32_O32
+	$(Q)$(MAKE) $(build)=arch/mips missing-syscalls-o32
+endif