From: Avi Kivity <avi@qumranet.com>
To: paulus@samba.org
Cc: kvm-devel@lists.sourceforge.net, linuxppc-dev@ozlabs.org,
linux-kernel@vger.kernel.org, Avi Kivity <avi@qumranet.com>
Subject: [PATCH] powerpc: Allow smp_call_function_single() to current cpu
Date: Thu, 19 Jul 2007 18:33:48 +0300 [thread overview]
Message-ID: <11848592284075-git-send-email-avi@qumranet.com> (raw)
This removes the requirement for callers to get_cpu() to check in simple
cases. i386 and x86_64 already received a similar treatment.
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/powerpc/kernel/smp.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index d577b71..087c92f 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -284,7 +284,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int
int wait)
{
cpumask_t map = CPU_MASK_NONE;
- int ret = -EBUSY;
+ int ret = 0;
if (!cpu_online(cpu))
return -EINVAL;
@@ -292,6 +292,11 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int
cpu_set(cpu, map);
if (cpu != get_cpu())
ret = smp_call_function_map(func,info,nonatomic,wait,map);
+ else {
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
+ }
put_cpu();
return ret;
}
--
1.5.2.4
reply other threads:[~2007-07-19 15:57 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=11848592284075-git-send-email-avi@qumranet.com \
--to=avi@qumranet.com \
--cc=kvm-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).