Re: [PATCH -next] arm64: Export __cpu_logical_map

From: Kefeng Wang
Date: Fri Jul 24 2020 - 05:16:59 EST

On 2020/7/24 16:16, Anshuman Khandual wrote:
On 07/24/2020 08:38 AM, Kefeng Wang wrote:
This does not seem to be a correct method of posting any patch.
sorryï forget to cc mailist when git send-email
On 2020/7/24 11:04, Kefeng Wang wrote:
ERROR: modpost: "__cpu_logical_map" [drivers/cpufreq/tegra194-cpufreq.ko] undefined!

ARM64 tegra194-cpufreq driver use cpu_logical_map, export
__cpu_logical_map to fix build issue.
Commit 887d5fc82cb4 ("cpufreq: Add Tegra194 cpufreq driver") which adds
this particular driver is present just on linux-next. But as expected,
the driver does not use __cpu_logical_map directly but instead accesses
it via cpu_logical_map() wrapper. Wondering, how did you even trigger
the modpost error ?

arch/arm64/include/asm/smp.h:#define cpu_logical_map(cpu) __cpu_logical_map[cpu]

Will see the error when using allmodconfig to build.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Kefeng Wang <>
 arch/arm64/kernel/setup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index c793276ec7ad9..3aea05fbb9998 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)
  u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
  void __init setup_arch(char **cmdline_p)

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