These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / arm64 / lib / Makefile

diff --git a/kernel/arch/arm64/lib/Makefile b/kernel/arch/arm64/lib/Makefile
index d98d3e3..1a811ec 100644 (file)
--- a/kernel/arch/arm64/lib/Makefile
+++ b/kernel/arch/arm64/lib/Makefile
@@ -3,3 +3,16 @@ lib-y          := bitops.o clear_user.o delay.o copy_from_user.o       \
                   clear_page.o memchr.o memcpy.o memmove.o memset.o    \
                   memcmp.o strcmp.o strncmp.o strlen.o strnlen.o       \
                   strchr.o strrchr.o
+
+# Tell the compiler to treat all general purpose registers as
+# callee-saved, which allows for efficient runtime patching of the bl
+# instruction in the caller with an atomic instruction when supported by
+# the CPU. Result and argument registers are handled correctly, based on
+# the function prototype.
+lib-$(CONFIG_ARM64_LSE_ATOMICS) += atomic_ll_sc.o
+CFLAGS_atomic_ll_sc.o  := -fcall-used-x0 -ffixed-x1 -ffixed-x2         \
+                  -ffixed-x3 -ffixed-x4 -ffixed-x5 -ffixed-x6          \
+                  -ffixed-x7 -fcall-saved-x8 -fcall-saved-x9           \
+                  -fcall-saved-x10 -fcall-saved-x11 -fcall-saved-x12   \
+                  -fcall-saved-x13 -fcall-saved-x14 -fcall-saved-x15   \
+                  -fcall-saved-x16 -fcall-saved-x17 -fcall-saved-x18