Re: [PATCH v7 8/8] sched/topology: Unify tl_pkg_mask() across core and all arch

[Christophe Leroy <christophe.leroy@xxxxxxxxxx>]

Le 26/08/2025 à 06:13, K Prateek Nayak a écrit :
> Unify the tl_pkg_mask() wrapper around cpu_nod_mask() across core, x86,
> powerpc, and s390.
>
> No functional changes intended.
>
> Signed-off-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
> ---
>   arch/powerpc/kernel/smp.c      | 7 +------
>   arch/s390/kernel/topology.c    | 7 +------
>   arch/x86/kernel/smpboot.c      | 5 -----
>   include/linux/sched/topology.h | 6 ++++++
>   kernel/sched/topology.c        | 5 -----
>   5 files changed, 8 insertions(+), 22 deletions(-)
>
> diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
> index 40719679385b..8e869c13f7ed 100644
> --- a/arch/powerpc/kernel/smp.c
> +++ b/arch/powerpc/kernel/smp.c
> @@ -1064,11 +1064,6 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
>   }
>   #endif
>   
> -static const struct cpumask *cpu_pkg_mask(struct sched_domain_topology_level *tl, int cpu)
> -{
> -	return cpu_node_mask(cpu);
> -}
> -
>   static int __init init_big_cores(void)
>   {
>   	int cpu;
> @@ -1728,7 +1723,7 @@ static void __init build_sched_topology(void)
>   	}
>   #endif
>   
> -	powerpc_topology[i++] = SDTL_INIT(cpu_pkg_mask, powerpc_shared_proc_flags, PKG);
> +	powerpc_topology[i++] = SDTL_INIT(tl_pkg_mask, powerpc_shared_proc_flags, PKG);
>   
>   	/* There must be one trailing NULL entry left.  */
>   	BUG_ON(i >= ARRAY_SIZE(powerpc_topology) - 1);
> diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
> index 8dbf32f362e1..8f5b6ecc055f 100644
> --- a/arch/s390/kernel/topology.c
> +++ b/arch/s390/kernel/topology.c
> @@ -524,17 +524,12 @@ static const struct cpumask *cpu_drawer_mask(struct sched_domain_topology_level
>   	return &cpu_topology[cpu].drawer_mask;
>   }
>   
> -static const struct cpumask *cpu_pkg_mask(struct sched_domain_topology_level *tl, int cpu)
> -{
> -	return cpu_node_mask(cpu);
> -}
> -
>   static struct sched_domain_topology_level s390_topology[] = {
>   	SDTL_INIT(tl_smt_mask, cpu_smt_flags, SMT),
>   	SDTL_INIT(tl_mc_mask, cpu_core_flags, MC),
>   	SDTL_INIT(cpu_book_mask, NULL, BOOK),
>   	SDTL_INIT(cpu_drawer_mask, NULL, DRAWER),
> -	SDTL_INIT(cpu_pkg_mask, NULL, PKG),
> +	SDTL_INIT(tl_pkg_mask, NULL, PKG),
>   	{ NULL, },
>   };
>   
> diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
> index bfbcac9a73d1..6c0ab30a80e2 100644
> --- a/arch/x86/kernel/smpboot.c
> +++ b/arch/x86/kernel/smpboot.c
> @@ -472,11 +472,6 @@ static int x86_cluster_flags(void)
>   }
>   #endif
>   
> -static const struct cpumask *tl_pkg_mask(struct sched_domain_topology_level *tl, int cpu)
> -{
> -	return cpu_node_mask(cpu);
> -}
> -
>   /*
>    * Set if a package/die has multiple NUMA nodes inside.
>    * AMD Magny-Cours, Intel Cluster-on-Die, and Intel
> diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h
> index 075d1f063668..807603bfe8ff 100644
> --- a/include/linux/sched/topology.h
> +++ b/include/linux/sched/topology.h
> @@ -71,6 +71,12 @@ struct cpumask *tl_mc_mask(struct sched_domain_topology_level *tl, int cpu)
>   }
>   #endif /* CONFIG_SCHED_MC */
>   
> +static const __maybe_unused

Same as the three previous patches, __maybe_unused shouldn't be required.

> +struct cpumask *tl_pkg_mask(struct sched_domain_topology_level *tl, int cpu)
> +{
> +	return cpu_node_mask(cpu);
> +}
> +
>   #ifdef CONFIG_NUMA
>   static inline int cpu_numa_flags(void)
>   {
> diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
> index 77d14430c5e1..18889bd97e22 100644
> --- a/kernel/sched/topology.c
> +++ b/kernel/sched/topology.c
> @@ -1724,11 +1724,6 @@ sd_init(struct sched_domain_topology_level *tl,
>   	return sd;
>   }
>   
> -static const struct cpumask *tl_pkg_mask(struct sched_domain_topology_level *tl, int cpu)
> -{
> -	return cpu_node_mask(cpu);
> -}
> -
>   /*
>    * Topology list, bottom-up.
>    */