linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Peter Zijlstra <peterz@infradead.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Christian Eggers <ceggers@arri.de>,
	tglx@linutronix.de, linux-rt-users@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: sched: system doesn't boot since  "sched: Add new migrate_disable() implementation"
Date: Tue, 20 Oct 2020 13:30:09 +0200	[thread overview]
Message-ID: <20201020113009.GR2628@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20201019150935.koqbk57dmahhomdc@linutronix.de>

On Mon, Oct 19, 2020 at 05:09:35PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-10-19 12:21:06 [+0200], Christian Eggers wrote:
> > I have problems with the latest 5.9-rt releases on i.MX6ULL (!CONFIG_SMP):
> > 
> …
> > Any hints?
> 
> Thank you for the report. The reason is the migrate_disable()
> implementation for !SMP.

This should fix things I suppose. I'll fold it in.

---
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -378,7 +378,12 @@ static inline void preempt_notifier_init
 extern void migrate_disable(void);
 extern void migrate_enable(void);
 
-#else /* !(CONFIG_SMP && CONFIG_PREEMPT_RT) */
+#elif defined(CONFIG_PREEMPT_RT)
+
+static inline void migrate_disable(void) { }
+static inline void migrate_enable(void { }
+
+#else /* !CONFIG_PREEMPT_RT */
 
 /**
  * migrate_disable - Prevent migration of the current task

  reply	other threads:[~2020-10-20 11:30 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-19 10:21 sched: system doesn't boot since "sched: Add new migrate_disable() implementation" Christian Eggers
2020-10-19 15:09 ` Sebastian Andrzej Siewior
2020-10-20 11:30   ` Peter Zijlstra [this message]
2020-10-20 11:38     ` Sebastian Andrzej Siewior
2020-10-20 11:41       ` Peter Zijlstra
2020-10-20 11:51         ` Sebastian Andrzej Siewior
2020-10-20 12:38     ` Christian Eggers

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=20201020113009.GR2628@hirez.programming.kicks-ass.net \
    --to=peterz@infradead.org \
    --cc=bigeasy@linutronix.de \
    --cc=ceggers@arri.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-users@vger.kernel.org \
    --cc=tglx@linutronix.de \
    /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).