linux-kernel - [PATCH] fix arm64 build with lack of __cpu_logical

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Message-ID: <20200808124242.GA352821@kroah.com>
Date:   Sat, 8 Aug 2020 14:42:42 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Gavin Shan <gshan@...hat.com>, Mark Rutland <mark.rutland@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: [PATCH] fix arm64 build with lack of __cpu_logical_map exported

Currently Linus's tree fails with the following build error on arm64
makeallmodconfig:
	ERROR: modpost: "__cpu_logical_map" [drivers/cpufreq/tegra194-cpufreq.ko] undefined!

Seems that kernel.ci also notices this for the past 2 days:
	https://lore.kernel.org/r/5f2c97ab.1c69fb81.160f4.0196@mx.google.com
	https://lore.kernel.org/r/5f2ab734.1c69fb81.24b16.8537@mx.google.com

Fix this up by just exporting the symbol.  Don't know if it's the
"right" fix, but it solves the build error for my machines.

Reported-by: "kernelci.org bot" <bot@...nelci.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>


diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 87e81d29e6fb..b421a4756793 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -275,6 +275,7 @@ static int __init reserve_memblock_reserved_regions(void)
 arch_initcall(reserve_memblock_reserved_regions);
 
 u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
+EXPORT_SYMBOL_GPL(__cpu_logical_map);
 
 void __init __no_sanitize_address setup_arch(char **cmdline_p)
 {