Messages in this thread Patch in this message | | | From | Saeed Mahameed <> | Subject | [PATCH net-next 03/14] lib: cpu_rmap: Add irq_cpu_rmap_remove to complement irq_cpu_rmap_add | Date | Sun, 19 Feb 2023 22:14:31 -0800 |
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From: Eli Cohen <elic@nvidia.com>
Add a function to complement irq_cpu_rmap_add(). It removes the irq from the reverse mapping by setting the notifier to NULL.
CC: Ben Hutchings <bhutchings@solarflare.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: David Decotigny <decot@googlers.com> CC: Eric Dumazet <edumazet@google.com> CC: linux-kernel@vger.kernel.org Signed-off-by: Eli Cohen <elic@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> --- include/linux/cpu_rmap.h | 2 ++ lib/cpu_rmap.c | 11 +++++++++++ 2 files changed, 13 insertions(+)
diff --git a/include/linux/cpu_rmap.h b/include/linux/cpu_rmap.h index 0ec745e6cd36..58284f1f3a58 100644 --- a/include/linux/cpu_rmap.h +++ b/include/linux/cpu_rmap.h @@ -60,6 +60,8 @@ static inline struct cpu_rmap *alloc_irq_cpu_rmap(unsigned int size) } extern void free_irq_cpu_rmap(struct cpu_rmap *rmap); +extern int irq_cpu_rmap_remove(struct cpu_rmap *rmap, int irq); extern int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq); + #endif /* __LINUX_CPU_RMAP_H */ diff --git a/lib/cpu_rmap.c b/lib/cpu_rmap.c index e95d018e01c2..7c67e9382845 100644 --- a/lib/cpu_rmap.c +++ b/lib/cpu_rmap.c @@ -285,6 +285,17 @@ static void irq_cpu_rmap_release(struct kref *ref) kfree(glue); } +/** + * irq_cpu_rmap_remove - remove an IRQ from a CPU affinity reverse-map + * @rmap: The reverse-map + * @irq: The IRQ number + */ +int irq_cpu_rmap_remove(struct cpu_rmap *rmap, int irq) +{ + return irq_set_affinity_notifier(irq, NULL); +} +EXPORT_SYMBOL(irq_cpu_rmap_remove); + /** * irq_cpu_rmap_add - add an IRQ to a CPU affinity reverse-map * @rmap: The reverse-map -- 2.39.1
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