[U-Boot] [PATCH] arm: fix hvc call

[Ibai Erkiaga]

HVC call makes use of 6 arguments rather than 7 in the same way as SMC
calls. The 7th argument is optional for both HVC and SMC but is
implemented as 16-bit parameter and register R7 or W7.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza at xilinx.com>
---
The issue does not report any error in a normal build as hvc_call is not
used at all and is optimized by the compiler. Using -O0 triggers the
error so the patch is intended to fix issues on a ongoing effor to build
U-Boot with -O0.

 arch/arm/cpu/armv8/fwcall.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/cpu/armv8/fwcall.c b/arch/arm/cpu/armv8/fwcall.c
index 9957c29..b0aca1b 100644
--- a/arch/arm/cpu/armv8/fwcall.c
+++ b/arch/arm/cpu/armv8/fwcall.c
@@ -28,7 +28,6 @@ static void hvc_call(struct pt_regs *args)
                "ldr x4, %4\n"
                "ldr x5, %5\n"
                "ldr x6, %6\n"
-               "ldr x7, %7\n"
                "hvc    #0\n"
                "str x0, %0\n"
                "str x1, %1\n"
@@ -37,7 +36,7 @@ static void hvc_call(struct pt_regs *args)
                : "+m" (args->regs[0]), "+m" (args->regs[1]),
                  "+m" (args->regs[2]), "+m" (args->regs[3])
                : "m" (args->regs[4]), "m" (args->regs[5]),
-                 "m" (args->regs[6]), "m" (args->regs[7])
+                 "m" (args->regs[6])
                : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
                  "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
                  "x16", "x17");
--
1.8.3.1

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