bus: arm-cci: remove unnecessary unreachable()

(commit 10d8713429d345867fc8998d6193b233c0cab28c upstream)

Mixing asm and C code is not recommended in a naked function by
gcc and leads to an error when using clang:
  drivers/bus/arm-cci.c:2107:2: error: non-ASM statement in naked
  function is not supported
        unreachable();
        ^

While the function is marked __naked it actually properly return
in asm. There is no need for the unreachable() call.

GCC 7.2 generates identical object files before and after, other
than (for obvious reasons) the line numbers generated by
WANT_WARN_ON_SLOWPATH for all the WARN()s appearing later in the
file.

Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 5426c04fe24bc88faa88a2cff0624ccbce277ebe..fc2da3a617ac42cb039b3b2e73c7ec11bb498ce8 100644 (file)
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -2103,8 +2103,6 @@ asmlinkage void __naked cci_enable_port_for_self(void)
        [sizeof_struct_cpu_port] "i" (sizeof(struct cpu_port)),
        [sizeof_struct_ace_port] "i" (sizeof(struct cci_ace_port)),
        [offsetof_port_phys] "i" (offsetof(struct cci_ace_port, phys)) );
-
-       unreachable();
 }
 
 /**