Re: [PATCH 16/22] arm64/cpuinfo: Convert to hotplug state machine
From: Suzuki K Poulose
Date: Tue Nov 29 2016 - 12:26:17 EST
On 26/11/16 23:13, Sebastian Andrzej Siewior wrote:
From: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
arch/arm64/kernel/cpuinfo.c | 37 +++++++++----------------------------
1 file changed, 9 insertions(+), 28 deletions(-)
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 19aad7041e14..7b7be71e87bf 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -227,7 +227,7 @@ static struct attribute_group cpuregs_attr_group = {
...
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "arm64/cpuinfo:online",
+ cpuid_cpu_online, cpuid_cpu_offline);
+ if (ret < 0) {
+ pr_err("cpuinfo: failed to register hotplug callbacks.\n");
+ return ret;
+ }
return 0;
}
Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>