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From: Ingo Molnar <mingo@kernel.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	jgross@suse.com, roland@purestorage.com,
	akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [patch for 4.0] x86: silence warning in /dev/mem support
Date: Thu, 16 Apr 2015 12:09:54 +0200	[thread overview]
Message-ID: <20150416100954.GA7847@gmail.com> (raw)
In-Reply-To: <20150416080440.GA507@amd>


* Pavel Machek <pavel@ucw.cz> wrote:

> The compiler is right, the code is tricky, but it is also correct
> AFAICT.
> 
> Signed-off-by: Pavel Machek <pavel@ucw.cz>
> 
> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
> index fdf617c..8a8dce8 100644
> --- a/arch/x86/mm/ioremap.c
> +++ b/arch/x86/mm/ioremap.c
> @@ -341,7 +341,7 @@ void *xlate_dev_mem_ptr(phys_addr_t phys)
>  
>  	addr = (void __force *)ioremap_cache(start, PAGE_SIZE);
>  	if (addr)
> -		addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
> +		addr = (void *)((unsigned long)addr | (unsigned long) (phys & ~PAGE_MASK));

What warning did it generate and which compiler version?

Thanks,

	Ingo

  reply	other threads:[~2015-04-16 10:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-16  8:04 [patch for 4.0] x86: silence warning in /dev/mem support Pavel Machek
2015-04-16 10:09 ` Ingo Molnar [this message]
2015-04-16 10:15   ` Pavel Machek
2015-04-17  8:39     ` Ingo Molnar
2015-04-17  8:48       ` Pavel Machek
2015-04-20  6:52         ` Ingo Molnar
2015-04-20 10:13 ` [tip:x86/urgent] x86/mm: Clean up types in xlate_dev_mem_ptr() tip-bot for Ingo Molnar

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