linux-kernel - [PATCH v5.10 RESEND 15/15] arm64: armv8_deprecated: fix unused-function error

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Date:   Wed, 11 Oct 2023 10:05:45 +0000
From:   Jinjie Ruan <ruanjinjie@...wei.com>
To:     <catalin.marinas@....com>, <will@...nel.org>,
        <yuzenghui@...wei.com>, <anshuman.khandual@....com>,
        <gregkh@...uxfoundation.org>, <mark.rutland@....com>,
        <broonie@...nel.org>, <youngmin.nam@...sung.com>,
        <ardb@...nel.org>, <f.fainelli@...il.com>, <james.morse@....com>,
        <sashal@...nel.org>, <scott@...amperecomputing.com>,
        <ebiederm@...ssion.com>, <haibinzhang@...cent.com>,
        <hewenliang4@...wei.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <stable@...nel.org>
CC:     <ruanjinjie@...wei.com>
Subject: [PATCH v5.10 RESEND 15/15] arm64: armv8_deprecated: fix unused-function error

From: Ren Zhijie <renzhijie2@...wei.com>

commit 223d3a0d30b6e9f979f5642e430e1753d3e29f89 upstream.

If CONFIG_SWP_EMULATION is not set and
CONFIG_CP15_BARRIER_EMULATION is not set,
aarch64-linux-gnu complained about unused-function :

arch/arm64/kernel/armv8_deprecated.c:67:21: error: ‘aarch32_check_condition’ defined but not used [-Werror=unused-function]
 static unsigned int aarch32_check_condition(u32 opcode, u32 psr)
                     ^~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

To fix this warning, modify aarch32_check_condition() with __maybe_unused.

Fixes: 0c5f416219da ("arm64: armv8_deprecated: move aarch32 helper earlier")
Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
Acked-by: Mark Rutland <mark.rutland@....com>
Link: https://lore.kernel.org/r/20221124022429.19024-1-renzhijie2@huawei.com
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 arch/arm64/kernel/armv8_deprecated.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c
index fd529c6c108b..f0ba854f0045 100644
--- a/arch/arm64/kernel/armv8_deprecated.c
+++ b/arch/arm64/kernel/armv8_deprecated.c
@@ -64,7 +64,7 @@ struct insn_emulation {
 
 #define	ARM_OPCODE_CONDITION_UNCOND	0xf
 
-static unsigned int aarch32_check_condition(u32 opcode, u32 psr)
+static unsigned int __maybe_unused aarch32_check_condition(u32 opcode, u32 psr)
 {
 	u32 cc_bits  = opcode >> 28;
 
-- 
2.34.1