[PATCH 2/5] lib/crc: arm64: Use existing macros for kernel-mode FPU cflags

Ard Biesheuvel
2026-03-30T14:46:45Z

Use the existing CC_FPU_CFLAGS and CC_NO_FPU_CFLAGS to pass the
appropriate compiler command line options for building kernel mode NEON
intrinsics code. This is tidier, and will make it easier to reuse the
code for 32-bit ARM.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
lib/crc/Makefile | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/crc/Makefile b/lib/crc/Makefile
index c9c35419b39c..ff213590e4e3 100644
--- a/lib/crc/Makefile
+++ b/lib/crc/Makefile
@@ -39,9 +39,8 @@ crc64-y := crc64-main.o
ifeq ($(CONFIG_CRC64_ARCH),y)
CFLAGS_crc64-main.o += -I$(src)/$(SRCARCH)

-CFLAGS_REMOVE_arm64/crc64-neon-inner.o += -mgeneral-regs-only
-CFLAGS_arm64/crc64-neon-inner.o += -ffreestanding -march=armv8-a+crypto
-CFLAGS_arm64/crc64-neon-inner.o += -isystem $(shell $(CC) -print-file-name=include)
+CFLAGS_REMOVE_arm64/crc64-neon-inner.o += $(CC_FLAGS_NO_FPU)
+CFLAGS_arm64/crc64-neon-inner.o += $(CC_FLAGS_FPU) -march=armv8-a+crypto
crc64-$(CONFIG_ARM64) += arm64/crc64-neon-inner.o

crc64-$(CONFIG_RISCV) += riscv/crc64_lsb.o riscv/crc64_msb.o
--
2.53.0.1018.g2bb0e51243-goog