linux-kernel - [PATCH v2] MIPS: undefine and redefine cpu_has

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Date:   Fri, 29 Apr 2022 11:26:21 +0800
From:   Stephen Zhang <starzhangzsd@...il.com>
To:     tsbogend@...ha.franken.de, liam.howlett@...cle.com,
        ebiederm@...ssion.com, dbueso@...e.de, alobakin@...me,
        f.fainelli@...il.com, paul@...pouillou.net, linux@...ck-us.net,
        anemo@....ocn.ne.jp
Cc:     zhangshida@...inos.cn, starzhangzsd@...il.com,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        "Maciej W . Rozycki" <macro@...am.me.uk>
Subject: [PATCH v2] MIPS: undefine and redefine cpu_has_fpu when it is overrided

From: Shida Zhang <zhangshida@...inos.cn>

Undefine and redefine cpu_has_fpu to 0 when it is overridden with
the "nofpu" option.

Suggested-by: Maciej W. Rozycki <macro@...am.me.uk>
Signed-off-by: Shida Zhang <zhangshida@...inos.cn>
---
 Changelog in v1 -> v2:
 - Choose to redefine cpu_has_fpu to solve the problem.

 arch/mips/include/asm/cpu-features.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index de8cb2ccb781..38eb469008b6 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -134,6 +134,10 @@
 # endif
 #else
 # define raw_cpu_has_fpu	cpu_has_fpu
+# ifndef CONFIG_MIPS_FP_SUPPORT
+#  undef cpu_has_fpu
+#  define cpu_has_fpu		0
+# endif
 #endif
 #ifndef cpu_has_32fpr
 #define cpu_has_32fpr		__isa_ge_or_opt(1, MIPS_CPU_32FPR)
-- 
2.30.2