linux-kernel - [PATCH] MIPS: Limit check_bugs32() under CONFIG

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Date:   Thu,  9 Apr 2020 11:10:29 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [PATCH] MIPS: Limit check_bugs32() under CONFIG_32BIT

There is no need to build and call check_bugs32() under CONFIG_64BIT,
just limit it under CONFIG_32BIT.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/include/asm/bugs.h | 4 +++-
 arch/mips/kernel/cpu-probe.c | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/bugs.h b/arch/mips/include/asm/bugs.h
index d72dc6e..5f8d2bf 100644
--- a/arch/mips/include/asm/bugs.h
+++ b/arch/mips/include/asm/bugs.h
@@ -35,7 +35,9 @@ static inline void check_bugs(void)
 	unsigned int cpu = smp_processor_id();
 
 	cpu_data[cpu].udelay_val = loops_per_jiffy;
-	check_bugs32();
+
+	if (IS_ENABLED(CONFIG_32BIT))
+		check_bugs32();
 
 	if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
 		check_bugs64();
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index f21a230..85d7273 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -461,6 +461,7 @@ static inline void cpu_set_mt_per_tc_perf(struct cpuinfo_mips *c)
 		c->options |= MIPS_CPU_MT_PER_TC_PERF_COUNTERS;
 }
 
+#ifdef CONFIG_32BIT
 static inline void check_errata(void)
 {
 	struct cpuinfo_mips *c = &current_cpu_data;
@@ -484,6 +485,7 @@ void __init check_bugs32(void)
 {
 	check_errata();
 }
+#endif /* CONFIG_32BIT */
 
 /*
  * Probe whether cpu has config register by trying to play with
-- 
2.1.0