From b7e8c9397cd4efe6567d2728f091f1b728025533 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Mon, 18 Feb 2019 00:58:29 +0100 Subject: ARM: 8845/1: use unified assembler in c files Use unified assembler syntax (UAL) in inline assembler. Divided syntax is considered deprecated. This will also allow to build the kernel using LLVM's integrated assembler. When compiling non-Thumb2 GCC always emits a ".syntax divided" at the beginning of the inline assembly which makes the assembler fail. Since GCC 5 there is the -masm-syntax-unified GCC option which make GCC assume unified syntax asm and hence emits ".syntax unified" even in ARM mode. However, the option is broken since GCC version 6 (see GCC PR88648 [1]). Work around by adding ".syntax unified" as part of the inline assembly. [0] https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html#index-masm-syntax-unified [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88648 Signed-off-by: Stefan Agner Acked-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/mm/copypage-v4wb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm/mm/copypage-v4wb.c') diff --git a/arch/arm/mm/copypage-v4wb.c b/arch/arm/mm/copypage-v4wb.c index cd3e165afeed..6d336740aae4 100644 --- a/arch/arm/mm/copypage-v4wb.c +++ b/arch/arm/mm/copypage-v4wb.c @@ -27,6 +27,7 @@ static void v4wb_copy_user_page(void *kto, const void *kfrom) int tmp; asm volatile ("\ + .syntax unified\n\ ldmia %1!, {r3, r4, ip, lr} @ 4\n\ 1: mcr p15, 0, %0, c7, c6, 1 @ 1 invalidate D line\n\ stmia %0!, {r3, r4, ip, lr} @ 4\n\ @@ -38,7 +39,7 @@ static void v4wb_copy_user_page(void *kto, const void *kfrom) ldmia %1!, {r3, r4, ip, lr} @ 4\n\ subs %2, %2, #1 @ 1\n\ stmia %0!, {r3, r4, ip, lr} @ 4\n\ - ldmneia %1!, {r3, r4, ip, lr} @ 4\n\ + ldmiane %1!, {r3, r4, ip, lr} @ 4\n\ bne 1b @ 1\n\ mcr p15, 0, %1, c7, c10, 4 @ 1 drain WB" : "+&r" (kto), "+&r" (kfrom), "=&r" (tmp) -- cgit v1.2.3