Merge tag 'riscv-for-linus-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:

 - fix broken clang build on versions earlier than 19 and binutils
   versions earlier than 2.38.

   (This exposed that we're not properly testing earlier toolchain
   versions in our linux-next builds and PR submissions. This was fixed
   for this PR, and is being addressed more generally for -next builds.)

 - remove some redundant Makefile code

 - avoid building Canaan Kendryte K210-specific code on targets that
   don't build for the K210

* tag 'riscv-for-linus-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix CONFIG_AS_HAS_INSN for new .insn usage
  riscv: Remove redundant judgment for the default build target
  riscv: Build loader.bin exclusively for Canaan K210

Author: torvalds

arch/riscv/Kconfig

@@ -367,7 +367,7 @@ config RISCV_NONSTANDARD_CACHE_OPS
 	  systems to handle cache management.
 
 config AS_HAS_INSN
-	def_bool $(as-instr,.insn r 51$(comma) 0$(comma) 0$(comma) t0$(comma) t0$(comma) zero)
+	def_bool $(as-instr,.insn 0x100000f)
 
 config AS_HAS_OPTION_ARCH
 	# https://github.com/llvm/llvm-project/commit/9e8ed3403c191ab9c4903e8eeb8f732ff8a43cb4

arch/riscv/Makefile

@@ -134,21 +134,6 @@ endif
 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
 
 # Default target when executing plain make
-boot		:= arch/riscv/boot
-ifeq ($(CONFIG_XIP_KERNEL),y)
-KBUILD_IMAGE := $(boot)/xipImage
-else
-ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy)
-KBUILD_IMAGE := $(boot)/loader.bin
-else
-ifeq ($(CONFIG_EFI_ZBOOT),)
-KBUILD_IMAGE	:= $(boot)/Image.gz
-else
-KBUILD_IMAGE := $(boot)/vmlinuz.efi
-endif
-endif
-endif
-
 boot					:= arch/riscv/boot
 boot-image-y				:= Image
 boot-image-$(CONFIG_KERNEL_BZIP2)	:= Image.bz2
@@ -159,7 +144,7 @@ boot-image-$(CONFIG_KERNEL_LZO)		:= Image.lzo
 boot-image-$(CONFIG_KERNEL_ZSTD)	:= Image.zst
 boot-image-$(CONFIG_KERNEL_XZ)		:= Image.xz
 ifdef CONFIG_RISCV_M_MODE
-boot-image-$(CONFIG_ARCH_CANAAN)	:= loader.bin
+boot-image-$(CONFIG_SOC_CANAAN_K210)	:= loader.bin
 endif
 boot-image-$(CONFIG_EFI_ZBOOT)		:= vmlinuz.efi
 boot-image-$(CONFIG_XIP_KERNEL)		:= xipImage