ACK: [SRU][IMPISH][JAMMY][KINETIC][PATCH] powerpc: Export mmu_feature_keys[] as non-GPL

[Cengiz Can]

Acked-by: Cengiz Can <cengiz.can at canonical.com>

On Mon, 2022-05-30 at 11:59 +0100, Dimitri John Ledkov wrote:
> From: Kevin Hao <haokexin at gmail.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1976248
> 
> When the mmu_feature_keys[] was introduced in the commit c12e6f24d413
> ("powerpc: Add option to use jump label for mmu_has_feature()"),
> it is unlikely that it would be used either directly or indirectly in
> the out of tree modules. So we exported it as GPL only.
> 
> But with the evolution of the codes, especially the PPC_KUAP support, it
> may be indirectly referenced by some primitive macro or inline functions
> such as get_user() or __copy_from_user_inatomic(), this will make it
> impossible to build many non GPL modules (such as ZFS) on ppc
> architecture. Fix this by exposing the mmu_feature_keys[] to the non-GPL
> modules too.
> 
> Fixes: 7613f5a66bec ("powerpc/64s/kuap: Use mmu_has_feature()")
> Reported-by: Nathaniel Filardo <nwfilardo at gmail.com>
> Signed-off-by: Kevin Hao <haokexin at gmail.com>
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
> Link: https://lore.kernel.org/r/20220329085709.4132729-1-haokexin@gmail.com
> (backported from commit d9e5c3e9e75162f845880535957b7fd0b4637d23 upstream)
> Signed-off-by: Dimitri John Ledkov <dimitri.ledkov at canonical.com>
> ---
>  arch/powerpc/kernel/cputable.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
> index 7bd6546b9fde..f9b3def5b254 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -2119,7 +2119,7 @@ void __init cpu_feature_keys_init(void)
>  struct static_key_true mmu_feature_keys[NUM_MMU_FTR_KEYS] = {
>  			[0 ... NUM_MMU_FTR_KEYS - 1] = STATIC_KEY_TRUE_INIT
>  };
> -EXPORT_SYMBOL_GPL(mmu_feature_keys);
> +EXPORT_SYMBOL(mmu_feature_keys);
>  
>  void __init mmu_feature_keys_init(void)
>  {
> -- 
> 2.32.0
> 
>