* [PATCH v2 08/14] parisc: Replace cpu_up/down with device_online/offline
[not found] <20191125112754.25223-1-qais.yousef@arm.com>
@ 2019-11-25 11:27 ` Qais Yousef
0 siblings, 0 replies; only message in thread
From: Qais Yousef @ 2019-11-25 11:27 UTC (permalink / raw)
To: Thomas Gleixner, Greg Kroah-Hartman
Cc: Qais Yousef, James E.J. Bottomley, Helge Deller, Richard Fontana,
Armijn Hemel, linux-parisc, linux-kernel
The core device API performs extra housekeeping bits that are missing
from directly calling cpu_up/down.
See commit a6717c01ddc2 ("powerpc/rtas: use device model APIs and
serialization during LPM") for an example description of what might go
wrong.
This also prepares to make cpu_up/down a private interface for anything
but the cpu subsystem.
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
CC: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
CC: Helge Deller <deller@gmx.de>
CC: Richard Fontana <rfontana@redhat.com>
CC: Armijn Hemel <armijn@tjaldur.nl>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: linux-parisc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
arch/parisc/kernel/processor.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index 13f771f74ee3..4dde5fe78f0c 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -212,7 +212,9 @@ static int __init processor_probe(struct parisc_device *dev)
#ifdef CONFIG_SMP
if (cpuid) {
set_cpu_present(cpuid, true);
- cpu_up(cpuid);
+ lock_device_hotplug();
+ device_online(get_cpu_device(cpuid));
+ unlock_device_hotplug();
}
#endif
--
2.17.1
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