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Date: Mon, 2 Jun 2014 19:32:12 -0400
From: Theodore Ts'o <tytso@mit.edu>
Subject: Re: [RFC 11/32] xfs: convert to struct inode_time
Message-ID: <20140602233212.GA2060@thunk.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>, linux-arch@vger.kernel.org, Linux NFS Mailing List <linux-nfs@vger.kernel.org>, Arnd Bergmann <arnd@arndb.de>, LKML Kernel <linux-kernel@vger.kernel.org>, xfs@oss.sgi.com, Christoph Hellwig <hch@infradead.org>, Chuck Lever <chuck.lever@oracle.com>, john.stultz@linaro.org, lftan@altera.com, linux-fsdevel <linux-fsdevel@vger.kernel.org>, geert@linux-m68k.org, tglx@linutronix.de, joseph@codesourcery.com

On Mon, Jun 02, 2014 at 03:32:35PM -0700, H. Peter Anvin wrote:
> On 06/02/2014 03:29 PM, Theodore Ts'o wrote:
> > 
> > And since we are already returning (time_t) -1 in some cases, we might
> > as well try to make things a bit more formal.
> > 
> 
> Are we?  I am not aware of *Linux* actually using that.

Linux's time(2) can return (time_t) -1 and set errno to EFAULT, per
the Posix specification:

SYSCALL_DEFINE1(time, time_t __user *, tloc)
{
	time_t i = get_seconds();

	if (tloc) {
		if (put_user(i,tloc))
			return -EFAULT;
	}
	force_successful_syscall_return();
	return i;
}

Cheers,

						- Ted

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