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From: Qais Yousef <qais.yousef@arm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Qais Yousef <qais.yousef@arm.com>,
	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
	Helge Deller <deller@gmx.de>,
	Richard Fontana <rfontana@redhat.com>,
	Armijn Hemel <armijn@tjaldur.nl>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-parisc@vger.kernel.org
Subject: [PATCH v4 12/17] parisc: Replace cpu_up/down with add/remove_cpu
Date: Mon, 23 Mar 2020 13:51:05 +0000
Message-ID: <20200323135110.30522-13-qais.yousef@arm.com> (raw)
In-Reply-To: <20200323135110.30522-1-qais.yousef@arm.com>

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 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index 13f771f74ee3..7f2d0c0ecc80 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -212,7 +212,7 @@ static int __init processor_probe(struct parisc_device *dev)
 #ifdef CONFIG_SMP
 	if (cpuid) {
 		set_cpu_present(cpuid, true);
-		cpu_up(cpuid);
+		add_cpu(cpuid);
 	}
 #endif
 
-- 
2.17.1


      parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 13:50 [PATCH v4 00/17] Convert cpu_up/down to device_online/offline Qais Yousef
2020-03-23 13:50 ` [PATCH v4 01/17] cpu: Add new {add,remove}_cpu() functions Qais Yousef
2020-03-23 15:00   ` Paul E. McKenney
2020-03-23 13:51 ` Qais Yousef [this message]

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