Merge tag 'firewire-update2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...

[karo-tx-linux.git] / arch / arm64 / lib / Makefile

diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index 1a811ecf71da8a8032a1e8cda8cf686f8fc71189..c86b7909ef312009028c46ba83b375b544d9ae84 100644 (file)
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -4,15 +4,16 @@ lib-y         := bitops.o clear_user.o delay.o copy_from_user.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.
+# Tell the compiler to treat all general purpose registers (with the
+# exception of the IP registers, which are already handled by the caller
+# in case of a PLT) 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
+                  -fcall-saved-x18