From: Gavin Shan <gshan@redhat.com>
To: Sudeep Holla <sudeep.holla@arm.com>, linux-kernel@vger.kernel.org
Cc: Atish Patra <atishp@atishpatra.org>,
Atish Patra <atishp@rivosinc.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Qing Wang <wangqing@vivo.com>,
linux-arm-kernel@lists.infradead.org,
linux-riscv@lists.infradead.org, Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v3 01/16] cacheinfo: Use of_cpu_device_node_get instead cpu_dev->of_node
Date: Wed, 1 Jun 2022 10:45:00 +0800 [thread overview]
Message-ID: <42bb2efe-e28c-fd15-d00e-8f45dc24b0d1@redhat.com> (raw)
In-Reply-To: <20220525081416.3306043-2-sudeep.holla@arm.com>
On 5/25/22 4:14 PM, Sudeep Holla wrote:
> The of_cpu_device_node_get takes care of fetching the CPU'd device node
> either from cached cpu_dev->of_node if cpu_dev is initialised or uses
> of_get_cpu_node to parse and fetch node if cpu_dev isn't available yet.
>
> Just use of_cpu_device_node_get instead of getting the cpu device first
> and then using cpu_dev->of_node for two reasons:
> 1. There is no other use of cpu_dev and can be simplified
> 2. It enabled the use detect_cache_attributes and hence cache_setup_of_node
> much earlier before the CPUs are registered as devices.
>
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
> drivers/base/cacheinfo.c | 9 ++-------
> 1 file changed, 2 insertions(+), 7 deletions(-)
>
Reviewed-by: Gavin Shan <gshan@redhat.com>
> diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
> index dad296229161..b0bde272e2ae 100644
> --- a/drivers/base/cacheinfo.c
> +++ b/drivers/base/cacheinfo.c
> @@ -14,7 +14,7 @@
> #include <linux/cpu.h>
> #include <linux/device.h>
> #include <linux/init.h>
> -#include <linux/of.h>
> +#include <linux/of_device.h>
> #include <linux/sched.h>
> #include <linux/slab.h>
> #include <linux/smp.h>
> @@ -157,7 +157,6 @@ static int cache_setup_of_node(unsigned int cpu)
> {
> struct device_node *np;
> struct cacheinfo *this_leaf;
> - struct device *cpu_dev = get_cpu_device(cpu);
> struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
> unsigned int index = 0;
>
> @@ -166,11 +165,7 @@ static int cache_setup_of_node(unsigned int cpu)
> return 0;
> }
>
> - if (!cpu_dev) {
> - pr_err("No cpu device for CPU %d\n", cpu);
> - return -ENODEV;
> - }
> - np = cpu_dev->of_node;
> + np = of_cpu_device_node_get(cpu);
> if (!np) {
> pr_err("Failed to find cpu%d device node\n", cpu);
> return -ENOENT;
>
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next prev parent reply other threads:[~2022-06-01 2:46 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 8:14 [PATCH v3 00/16] arch_topology: Updates to add socket support and fix cluster ids Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 01/16] cacheinfo: Use of_cpu_device_node_get instead cpu_dev->of_node Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 02/16] cacheinfo: Add helper to access any cache index for a given CPU Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 03/16] cacheinfo: Move cache_leaves_are_shared out of CONFIG_OF Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 04/16] cacheinfo: Add support to check if last level cache(LLC) is valid or shared Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 05/16] cacheinfo: Allow early detection and population of cache attributes Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 06/16] arch_topology: Add support to parse and detect " Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 07/16] arch_topology: Use the last level cache information from the cacheinfo Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 08/16] arm64: topology: Remove redundant setting of llc_id in CPU topology Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 09/16] arch_topology: Drop LLC identifier stash from the " Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 10/16] arch_topology: Set thread sibling cpumask only within the cluster Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 11/16] arch_topology: Check for non-negative value rather than -1 for IDs validity Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 12/16] arch_topology: Avoid parsing through all the CPUs once a outlier CPU is found Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 13/16] arch_topology: Don't set cluster identifier as physical package identifier Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 14/16] arch_topology: Drop unnecessary check for uninitialised package_id Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 15/16] arch_topology: Set cluster identifier in each core/thread from /cpu-map Sudeep Holla
2022-05-25 8:14 ` [PATCH v3 16/16] arch_topology: Add support for parsing sockets in /cpu-map Sudeep Holla
2022-06-03 12:30 ` [PATCH v3 15/16] arch_topology: Set cluster identifier in each core/thread from /cpu-map Dietmar Eggemann
2022-06-06 10:21 ` Sudeep Holla
2022-06-10 10:08 ` Vincent Guittot
2022-06-10 10:27 ` Sudeep Holla
2022-06-13 9:19 ` Dietmar Eggemann
2022-06-13 11:17 ` Sudeep Holla
2022-06-16 16:02 ` Dietmar Eggemann
2022-06-17 11:16 ` Sudeep Holla
2022-06-20 13:27 ` Dietmar Eggemann
2022-06-21 16:00 ` Sudeep Holla
2022-06-14 17:59 ` Vincent Guittot
2022-06-15 17:00 ` Sudeep Holla
2022-06-15 22:44 ` Vincent Guittot
2022-06-15 22:45 ` Vincent Guittot
2022-06-01 3:40 ` [PATCH v3 12/16] arch_topology: Avoid parsing through all the CPUs once a outlier CPU is found Gavin Shan
2022-06-01 3:38 ` [PATCH v3 11/16] arch_topology: Check for non-negative value rather than -1 for IDs validity Gavin Shan
2022-06-01 3:36 ` [PATCH v3 10/16] arch_topology: Set thread sibling cpumask only within the cluster Gavin Shan
2022-06-01 3:35 ` [PATCH v3 09/16] arch_topology: Drop LLC identifier stash from the CPU topology Gavin Shan
2022-06-01 12:06 ` Sudeep Holla
2022-06-02 6:44 ` Gavin Shan
2022-06-02 6:42 ` Gavin Shan
2022-06-02 6:42 ` [PATCH v3 08/16] arm64: topology: Remove redundant setting of llc_id in " Gavin Shan
2022-06-01 3:31 ` [PATCH v3 07/16] arch_topology: Use the last level cache information from the cacheinfo Gavin Shan
2022-06-02 14:26 ` Dietmar Eggemann
2022-06-06 9:54 ` Sudeep Holla
2022-06-01 3:29 ` [PATCH v3 06/16] arch_topology: Add support to parse and detect cache attributes Gavin Shan
2022-06-01 3:25 ` [PATCH v3 05/16] cacheinfo: Allow early detection and population of " Gavin Shan
2022-06-01 3:20 ` [PATCH v3 04/16] cacheinfo: Add support to check if last level cache(LLC) is valid or shared Gavin Shan
2022-06-01 2:51 ` [PATCH v3 03/16] cacheinfo: Move cache_leaves_are_shared out of CONFIG_OF Gavin Shan
2022-06-01 2:44 ` [PATCH v3 02/16] cacheinfo: Add helper to access any cache index for a given CPU Gavin Shan
2022-06-01 12:45 ` Sudeep Holla
2022-06-01 2:45 ` Gavin Shan [this message]
2022-06-01 3:49 ` [PATCH v3 00/16] arch_topology: Updates to add socket support and fix cluster ids Gavin Shan
2022-06-01 12:03 ` Sudeep Holla
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