linux-kernel - Re: [PATCHv7 8/8] printk: convert the rest to printk-safe

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Date:   Thu, 5 Jan 2017 10:00:50 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>, Tejun Heo <tj@...nel.org>,
        Calvin Owens <calvinowens@...com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Hurley <peter@...leysoftware.com>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCHv7 8/8] printk: convert the rest to printk-safe

On (01/04/17 17:28), Petr Mladek wrote:
> On Tue 2016-12-27 23:16:11, Sergey Senozhatsky wrote:
> > This patch converts the rest of logbuf users (which are
> > out of printk recursion case, but can deadlock in printk).
> > To make printk-safe usage easier the patch introduces 4
> > helper macros:
> > - logbuf_lock_irq()/logbuf_unlock_irq()
> >   lock/unlock the logbuf lock and disable/enable local IRQ
> > 
> > - logbuf_lock_irqsave(flags)/logbuf_unlock_irqrestore(flags)
> >   lock/unlock the logbuf lock and saves/restores local IRQ state
> > 
> > Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
> 
> I like that it is so straigforward using the new macros. It is great
> that you discovered this before we finished the patchset.
> 
> Reviewed-by: Petr Mladek <pmladek@...e.com>

thanks.

	-ss