From: Saeed Mahameed <saeed@kernel.org>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Eric Dumazet <edumazet@google.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>,
netdev@vger.kernel.org, Tariq Toukan <tariqt@nvidia.com>,
Eli Cohen <elic@nvidia.com>,
Ben Hutchings <bhutchings@solarflare.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Decotigny <decot@googlers.com>,
linux-kernel@vger.kernel.org
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 [thread overview]
Message-ID: <20230220061442.403092-4-saeed@kernel.org> (raw)
In-Reply-To: <20230220061442.403092-1-saeed@kernel.org>
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
next prev parent reply other threads:[~2023-02-20 6:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-20 6:14 [PATCH net-next 00/14] mlx5 dynamic msix Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 01/14] lib: cpu_rmap: Avoid use after free on rmap->obj array entries Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 02/14] lib: cpu_rmap: Use allocator for rmap entries Saeed Mahameed
2023-02-20 6:14 ` Saeed Mahameed [this message]
2023-02-20 6:14 ` [PATCH net-next 04/14] net/mlx5e: Coding style fix, add empty line Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 05/14] net/mlx5: Fix wrong comment Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 06/14] net/mlx5: Modify struct mlx5_irq to use struct msi_map Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 07/14] net/mlx5: Use newer affinity descriptor Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 08/14] net/mlx5: Improve naming of pci function vectors Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 09/14] net/mlx5: Refactor completion irq request/release code Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 10/14] net/mlx5: Use dynamic msix vectors allocation Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 11/14] net/mlx5: Move devlink registration before mlx5_load Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 12/14] net/mlx5: Refactor calculation of required completion vectors Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 13/14] net/mlx5: Use one completion vector if eth is disabled Saeed Mahameed
2023-02-20 6:14 ` [PATCH net-next 14/14] net/mlx5: Provide external API for allocating vectors Saeed Mahameed
2023-02-21 0:51 ` [PATCH net-next 00/14] mlx5 dynamic msix Jakub Kicinski
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