On Fri, Aug 19, 2022 at 6:18 PM Randy Dunlap <rdun...@infradead.org> wrote:
>
> Fix build error when CONFIG_DRM_AMDGPU=m:
>
> ERROR: modpost: "cpu_smallcore_map" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko]
> undefined!
>
> by exporting 'cpu_smallcore_map' just as other per_cpu
> symbols are exported.
>
> drivers/gpu/drm/amd/amdkfd/kfd_device.c calls cpu_smt_mask().
> This is an inline function on powerpc which references
> cpu_smallcore_map.
>
> Fixes: 425752c63b6f ("powerpc: Detect the presence of big-cores via "ibm,
> thread-groups"")
> Fixes: 7bc913085765 ("drm/amdkfd: Try to schedule bottom half on same core")
> Signed-off-by: Randy Dunlap <rdun...@infradead.org>
> Cc: Gautham R. Shenoy <e...@linux.vnet.ibm.com>
> Cc: Michael Ellerman <m...@ellerman.id.au>
> Cc: Nicholas Piggin <npig...@gmail.com>
> Cc: Christophe Leroy <christophe.le...@csgroup.eu>
> Cc: linuxppc-dev@lists.ozlabs.org
> Cc: amd-...@lists.freedesktop.org
> Cc: Felix Kuehling <felix.kuehl...@amd.com>
> Cc: Alex Deucher <alexander.deuc...@amd.com>
> Cc: Christian König <christian.koe...@amd.com>
> Cc: "Pan, Xinhui" <xinhui....@amd.com>
Acked-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> arch/powerpc/kernel/smp.c | 1 +
> 1 file changed, 1 insertion(+)
>
> --- a/arch/powerpc/kernel/smp.c
> +++ b/arch/powerpc/kernel/smp.c
> @@ -86,6 +86,7 @@ DEFINE_PER_CPU(cpumask_var_t, cpu_core_m
> static DEFINE_PER_CPU(cpumask_var_t, cpu_coregroup_map);
>
> EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
> +EXPORT_PER_CPU_SYMBOL(cpu_smallcore_map);
> EXPORT_PER_CPU_SYMBOL(cpu_l2_cache_map);
> EXPORT_PER_CPU_SYMBOL(cpu_core_map);
> EXPORT_SYMBOL_GPL(has_big_cores);
