linux-kernel - [PATCH] selftest/fpu: avoid clang warning

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Date:   Thu,  3 Dec 2020 23:36:30 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Petteri Aimonen <jpa@....mail.kapsi.fi>,
        Borislav Petkov <bp@...e.de>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: [PATCH] selftest/fpu: avoid clang warning

From: Arnd Bergmann <arnd@...db.de>

With extra warnings enabled, clang complains about the redundant
-mhard-float argument:

clang: error: argument unused during compilation: '-mhard-float' [-Werror,-Wunused-command-line-argument]

Move this into the gcc-only part of the Makefile.

Fixes: 4185b3b92792 ("selftests/fpu: Add an FPU selftest")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 lib/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index 985c6a8909e0..dc623561ef9d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -107,7 +107,7 @@ obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
 # off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS
 # get appended last to CFLAGS and thus override those previous compiler options.
 #
-FPU_CFLAGS := -mhard-float -msse -msse2
+FPU_CFLAGS := -msse -msse2
 ifdef CONFIG_CC_IS_GCC
 # Stack alignment mismatch, proceed with caution.
 # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
@@ -120,6 +120,7 @@ ifdef CONFIG_CC_IS_GCC
 #  -mpreferred-stack-boundary=3 is not between 4 and 12
 #
 # can be triggered. Otherwise gcc doesn't complain.
+FPU_CFLAGS += -mhard-float
 FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4)
 endif
 
-- 
2.27.0