riscv: optimized memcpy

[platform/kernel/linux-starfive.git] / arch / riscv / lib / Makefile

diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile
index 25d5c96..023d78f 100644 (file)
--- a/arch/riscv/lib/Makefile
+++ b/arch/riscv/lib/Makefile
@@ -1,9 +1,14 @@
 # SPDX-License-Identifier: GPL-2.0-only
 lib-y                  += delay.o
-lib-y                  += memcpy.o
 lib-y                  += memset.o
 lib-y                  += memmove.o
 lib-$(CONFIG_MMU)      += uaccess.o
 lib-$(CONFIG_64BIT)    += tishift.o
+lib-y                  += string.o
+
+# string.o implements standard library functions like memset/memcpy etc.
+# Use -ffreestanding to ensure that the compiler does not try to "optimize"
+# them into calls to themselves.
+CFLAGS_string.o := -ffreestanding
 
 obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o