From: Srikar Dronamraju Date: Mon, 10 Aug 2020 07:18:32 +0000 (+0530) Subject: powerpc/smp: Allocate cpumask only after searching thread group X-Git-Tag: v5.10.7~1317^2~101^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6e086302816b2ced602bc99641eb0189c05f018a;p=platform%2Fkernel%2Flinux-rpi.git powerpc/smp: Allocate cpumask only after searching thread group If allocated earlier and the search fails, then cpu_l1_cache_map cpumask is unnecessarily cleared. However cpu_l1_cache_map can be allocated / cleared after we search thread group. Please note CONFIG_CPUMASK_OFFSTACK is not set on Powerpc. Hence cpumask allocated by zalloc_cpumask_var_node is never freed. Signed-off-by: Srikar Dronamraju Reviewed-by: Gautham R. Shenoy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200810071834.92514-9-srikar@linux.vnet.ibm.com --- diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index a44b935..41f76c8 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -790,10 +790,6 @@ static int init_cpu_l1_cache_map(int cpu) if (err) goto out; - zalloc_cpumask_var_node(&per_cpu(cpu_l1_cache_map, cpu), - GFP_KERNEL, - cpu_to_node(cpu)); - cpu_group_start = get_cpu_thread_group_start(cpu, &tg); if (unlikely(cpu_group_start == -1)) { @@ -802,6 +798,9 @@ static int init_cpu_l1_cache_map(int cpu) goto out; } + zalloc_cpumask_var_node(&per_cpu(cpu_l1_cache_map, cpu), + GFP_KERNEL, cpu_to_node(cpu)); + for (i = first_thread; i < first_thread + threads_per_core; i++) { int i_group_start = get_cpu_thread_group_start(i, &tg);