Re: [RFC PATCH 6/8] powerpc/pseries: Add a helper for form1 cpu distance
From: David Gibson <hidden>
Date: 2021-06-15 03:59:19
On Mon, Jun 14, 2021 at 10:10:01PM +0530, Aneesh Kumar K.V wrote:
This helper is only used with the dispatch trace log collection. A later patch will add Form2 affinity support and this change helps in keeping that simpler. Also add a comment explaining we don't expect the code to be called with FORM0 Signed-off-by: Aneesh Kumar K.V <redacted>
Reviewed-by: David Gibson <redacted>
quoted hunk ↗ jump to hunk
--- arch/powerpc/mm/numa.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 64caaf07cf82..696e5bfe1414 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c@@ -166,7 +166,7 @@ static void unmap_cpu_from_node(unsigned long cpu) } #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ -int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) +static int __cpu_form1_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) { int dist = 0;@@ -182,6 +182,14 @@ int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) return dist; } +int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) +{ + /* We should not get called with FORM0 */ + VM_WARN_ON(affinity_form == FORM0_AFFINITY); + + return __cpu_form1_distance(cpu1_assoc, cpu2_assoc); +} + /* must hold reference to node during call */ static const __be32 *of_get_associativity(struct device_node *dev) {
-- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
Attachments
- signature.asc [application/pgp-signature] 833 bytes