commit a62fac911de564a403f5b371965f8189a106de5c
author Marek Behún <marek.behun@nic.cz> Thu May 20 13:24:11 2021 +0200
committer Tom Rini <trini@konsulko.com> Mon May 24 14:21:30 2021 -0400
tree 4ead221d15856cebdcab2adf66fb6611e5c6b3ac
parent a8cf1550960a4946fc4892cc9c60adedda195d47

ARM: fix LTO build for some thumb-interwork cases

Fix LTO build for some thumb-interwork usecases (such as for
da850evm_defconfig), where inline assmebly such as
  mrc p15,0,r2,c1,c0,0
causes the compiler to fail during LTO linking with
  Error: selected processor does not support `mrc p15,0,r2,c1,c0,0'
         in Thumb mode

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/cpu/arm926ejs/Makefile

diff --git a/arch/arm/cpu/arm926ejs/Makefile b/arch/arm/cpu/arm926ejs/Makefile
index af63d5c..98aafe8 100644
--- a/arch/arm/cpu/arm926ejs/Makefile
+++ b/arch/arm/cpu/arm926ejs/Makefile
@@ -25,6 +25,8 @@
 
 CFLAGS_cpu.o := -marm
 CFLAGS_cache.o := -marm
+CFLAGS_REMOVE_cpu.o := $(LTO_CFLAGS)
+CFLAGS_REMOVE_cache.o := $(LTO_CFLAGS)
 
 endif
 endif

arch/arm/lib/Makefile

diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 27b12e7..61bef1d 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -64,6 +64,7 @@
 
 obj-y	+= cache.o
 obj-$(CONFIG_SYS_ARM_CACHE_CP15)	+= cache-cp15.o
+CFLAGS_REMOVE_cache-cp15.o := $(LTO_CFLAGS)
 
 obj-y	+= psci-dt.o