powerpc/syscalls: switch to generic syscallhdr.sh

Many architectures duplicate similar shell scripts.

This commit converts powerpc to use scripts/syscallhdr.sh.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210301153019.362742-2-masahiroy@kernel.org

arch/powerpc/kernel/syscalls/Makefile

@@ -6,23 +6,20 @@ _dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)')	\
 	  $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
 
 syscall := $(src)/syscall.tbl
-syshdr := $(srctree)/$(src)/syscallhdr.sh
+syshdr := $(srctree)/scripts/syscallhdr.sh
 systbl := $(srctree)/scripts/syscalltbl.sh
 
 quiet_cmd_syshdr = SYSHDR  $@
-      cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@'	\
-		   '$(syshdr_abis_$(basetarget))'		\
-		   '$(syshdr_pfx_$(basetarget))'		\
-		   '$(syshdr_offset_$(basetarget))'
+      cmd_syshdr = $(CONFIG_SHELL) $(syshdr) --emit-nr --abis $(abis) $< $@
 
 quiet_cmd_systbl = SYSTBL  $@
       cmd_systbl = $(CONFIG_SHELL) $(systbl) --abis $(abis) $< $@
 
-syshdr_abis_unistd_32 := common,nospu,32
+$(uapi)/unistd_32.h: abis := common,nospu,32
 $(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
 	$(call if_changed,syshdr)
 
-syshdr_abis_unistd_64 := common,nospu,64
+$(uapi)/unistd_64.h: abis := common,nospu,64
 $(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
 	$(call if_changed,syshdr)
 

arch/powerpc/kernel/syscalls/syscallhdr.sh

-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-in="$1"
-out="$2"
-my_abis=`echo "($3)" | tr ',' '|'`
-prefix="$4"
-offset="$5"
-
-fileguard=_UAPI_ASM_POWERPC_`basename "$out" | sed \
-	-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
-	-e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
-grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
-	printf "#ifndef %s\n" "${fileguard}"
-	printf "#define %s\n" "${fileguard}"
-	printf "\n"
-
-	nxt=0
-	while read nr abi name entry compat ; do
-		if [ -z "$offset" ]; then
-			printf "#define __NR_%s%s\t%s\n" \
-				"${prefix}" "${name}" "${nr}"
-		else
-			printf "#define __NR_%s%s\t(%s + %s)\n" \
-				"${prefix}" "${name}" "${offset}" "${nr}"
-		fi
-		nxt=$((nr+1))
-	done
-
-	printf "\n"
-	printf "#ifdef __KERNEL__\n"
-	printf "#define __NR_syscalls\t%s\n" "${nxt}"
-	printf "#endif\n"
-	printf "\n"
-	printf "#endif /* %s */\n" "${fileguard}"
-) > "$out"