From: Paul Mackerras <paulus@samba.org>
To: linuxppc-dev@ozlabs.org
Cc: "Suresh E. Warrier" <warrier@linux.vnet.ibm.com>
Subject: Re: [PATCH] powerpc: Export __spin_yield
Date: Fri, 20 Mar 2015 10:08:48 +1100 [thread overview]
Message-ID: <20150319230848.GB31148@iris.ozlabs.ibm.com> (raw)
In-Reply-To: <54EE5989.7010800@linux.vnet.ibm.com>
On Wed, Feb 25, 2015 at 05:23:53PM -0600, Suresh E. Warrier wrote:
> Export __spin_yield so that the arch_spin_unlock() function can
> be invoked from a module. This will be required for modules where
> we want to take a lock that is also is acquired in hypervisor
> real mode. Because we want to avoid running any lockdep code
> (which may not be safe in real mode), this lock needs to be
> an arch_spinlock_t instead of a normal spinlock.
>
> Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
next prev parent reply other threads:[~2015-03-19 23:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-25 23:23 [PATCH] powerpc: Export __spin_yield Suresh E. Warrier
2015-03-19 23:08 ` Paul Mackerras [this message]
2015-03-30 10:17 ` Geert Uytterhoeven
2015-03-30 10:57 ` Benjamin Herrenschmidt
[not found] <1424477465-9199-2-git-send-email-warrier@linux.vnet.ibm.com>
2015-02-24 0:10 ` Suresh E. Warrier
2015-02-24 3:38 ` Benjamin Herrenschmidt
2015-02-24 16:37 ` Suresh E. Warrier
2015-02-24 21:11 ` Benjamin Herrenschmidt
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