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authorAndrew Murray2019-08-28 18:50:09 +0100
committerWill Deacon2019-08-29 15:53:49 +0100
commiteb3aabbfbfc203082d06a64517df97a3746ba9ea (patch)
tree826d910cc94d2f96ddf4fda0d0e249801565fd66 /arch/arm64/lib
parent3337cb5aea594e4090a660e3fc3250bb669b1305 (diff)
arm64: atomics: Remove atomic_ll_sc compilation unit
We no longer fall back to out-of-line atomics on systems with CONFIG_ARM64_LSE_ATOMICS where ARM64_HAS_LSE_ATOMICS is not set. Remove the unused compilation unit which provided these symbols. Signed-off-by: Andrew Murray <andrew.murray@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/lib')
-rw-r--r--arch/arm64/lib/Makefile19
-rw-r--r--arch/arm64/lib/atomic_ll_sc.c3
2 files changed, 0 insertions, 22 deletions
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index 33c2a4abda04..f10809ef1690 100644
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -11,25 +11,6 @@ CFLAGS_REMOVE_xor-neon.o += -mgeneral-regs-only
CFLAGS_xor-neon.o += -ffreestanding
endif
-# 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 := -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-x18 -fomit-frame-pointer
-CFLAGS_REMOVE_atomic_ll_sc.o := $(CC_FLAGS_FTRACE)
-GCOV_PROFILE_atomic_ll_sc.o := n
-KASAN_SANITIZE_atomic_ll_sc.o := n
-KCOV_INSTRUMENT_atomic_ll_sc.o := n
-UBSAN_SANITIZE_atomic_ll_sc.o := n
-
lib-$(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) += uaccess_flushcache.o
obj-$(CONFIG_CRC32) += crc32.o
diff --git a/arch/arm64/lib/atomic_ll_sc.c b/arch/arm64/lib/atomic_ll_sc.c
deleted file mode 100644
index b0c538b0da28..000000000000
--- a/arch/arm64/lib/atomic_ll_sc.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#include <asm/atomic.h>
-#define __ARM64_IN_ATOMIC_IMPL
-#include <asm/atomic_ll_sc.h>