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Message-Id: <20220621192034.3332546-3-sudeep.holla@arm.com>
Date: Tue, 21 Jun 2022 20:20:16 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: linux-kernel@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>
Cc: Sudeep Holla <sudeep.holla@....com>,
Atish Patra <atishp@...shpatra.org>,
Atish Patra <atishp@...osinc.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Qing Wang <wangqing@...o.com>,
Rob Herring <robh+dt@...nel.org>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Ionela Voinescu <ionela.voinescu@....com>,
Pierre Gondois <pierre.gondois@....com>,
linux-arm-kernel@...ts.infradead.org,
linux-riscv@...ts.infradead.org, Gavin Shan <gshan@...hat.com>
Subject: [PATCH v4 02/20] cacheinfo: Use of_cpu_device_node_get instead cpu_dev->of_node
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.
Reviewed-by: Gavin Shan <gshan@...hat.com>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
drivers/base/cacheinfo.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
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;
--
2.36.1
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