On Fri, 29 Oct 2021 at 07:31, Suzuki K Poulose [off-list ref] wrote:

Hi Arnd

Thanks for the fix.

On 29/10/2021 12:30, Arnd Bergmann wrote:

quoted

From: Arnd Bergmann <arnd@arndb.de>

It's now used in a coresight driver that can be a loadable module:

ERROR: modpost: "this_cpu_has_cap" [drivers/hwtracing/coresight/coresight-trbe.ko] undefined!

Fixes: 8a1065127d95 ("coresight: trbe: Add infrastructure for Errata handling")

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>

Will, Catalin, Mathieu,

Do you have a preference on how this fix can be pulled in ? This may
be safe to go via coresight tree if it is not too late. Otherwise,
it could go via the arm64 tree.

All the same to me.  It's in arm64 so I'll let Will and Catalin have
the final word.

Suzuki

quoted

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
Not sure if we actually want this to be exported, this is my local
workaround for the randconfig build bot.
---
  arch/arm64/kernel/cpufeature.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index ecbdff795f5e..beccbcfa7391 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c

@@ -2864,6 +2864,7 @@ bool this_cpu_has_cap(unsigned int n)

      return false;
  }
+EXPORT_SYMBOL(this_cpu_has_cap);

  /*
   * This helper function is used in a narrow window when,

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