powerpc: remove checks for binutils older than 2.25

Commit e441273 ("Documentation: raise minimum supported version of
binutils to 2.25") allows us to remove the checks for old binutils.

There is no more user for ld-ifversion. Remove it as well.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230119082250.151485-1-masahiroy@kernel.org

arch/powerpc/Makefile

@@ -42,18 +42,13 @@ machine-$(CONFIG_PPC64) += 64
 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
 UTS_MACHINE := $(subst $(space),,$(machine-y))
 
-# XXX This needs to be before we override LD below
-ifdef CONFIG_PPC32
-KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
-else
-ifeq ($(call ld-ifversion, -ge, 22500, y),y)
+ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
 # Have the linker provide sfpr if possible.
 # There is a corresponding test in arch/powerpc/lib/Makefile
 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
 else
 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 endif
-endif
 
 ifdef CONFIG_CPU_LITTLE_ENDIAN
 KBUILD_CFLAGS	+= -mlittle-endian
@@ -398,17 +393,7 @@ endif
 endif
 
 PHONY += checkbin
-# Check toolchain versions:
-# - gcc-4.6 is the minimum kernel-wide version so nothing required.
 checkbin:
-	@if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \
-		"x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \
-		echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
-		echo 'in some circumstances.' ; \
-		echo    '*** binutils 2.23 do not define the TOC symbol ' ; \
-		echo -n '*** Please use a different binutils version.' ; \
-		false ; \
-	fi
 	@if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
 		"x${CONFIG_LD_IS_BFD}" = "xy" -a \
 		"${CONFIG_LD_VERSION}" = "23700" ; then \

arch/powerpc/lib/Makefile

@@ -44,7 +44,7 @@ obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
 # 64-bit linker creates .sfpr on demand for final link (vmlinux),
 # so it is only needed for modules, and only for older linkers which
 # do not support --save-restore-funcs
-ifeq ($(call ld-ifversion, -lt, 22500, y),y)
+ifndef CONFIG_LD_IS_BFD
 extra-$(CONFIG_PPC64)	+= crtsavres.o
 endif
 

scripts/Makefile.compiler

@@ -72,7 +72,3 @@ clang-min-version = $(call test-ge, $(CONFIG_CLANG_VERSION), $1)
 # ld-option
 # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
 ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
-
-# ld-ifversion
-# Usage:  $(call ld-ifversion, -ge, 22252, y)
-ld-ifversion = $(shell [ $(CONFIG_LD_VERSION)0 $(1) $(2)0 ] && echo $(3) || echo $(4))