[PATCH] arm64: barrier: Remove spec_bar() macro

[Linus Walleij]

The spec_bar() macro was introduced in
commit bd4fb6d270bc ("arm64: Add support for SB barrier and patch in over DSB; ISB sequences")
as a way for C to insert a speculation barrier and was then
used in one single place: set_fs().

Later on
commit 3d2403fd10a1 ("arm64: uaccess: remove set_fs()")
deleted set_fs() altogether and as noted in the commit
on the new path the regular sb() assembly macro will
be used.

Delete the remnant.

Cc: Mark Rutland <mark.rutland at arm.com>
Fixes: 3d2403fd10a1 ("arm64: uaccess: remove set_fs()")
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
 arch/arm64/include/asm/barrier.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index c3009b0e5239..bab29932d21b 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -25,10 +25,6 @@
 #define psb_csync()	asm volatile("hint #17" : : : "memory")
 #define csdb()		asm volatile("hint #20" : : : "memory")
 
-#define spec_bar()	asm volatile(ALTERNATIVE("dsb nsh\nisb\n",		\
-						 SB_BARRIER_INSN"nop\n",	\
-						 ARM64_HAS_SB))
-
 #ifdef CONFIG_ARM64_PSEUDO_NMI
 #define pmr_sync()						\
 	do {							\
-- 
2.29.2