linux-kernel - Re: [PATCH v2 0/2] vfs: Define new syscall getumask.

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Message-ID: <20160418113954.GA13114@thunk.org>
Date:	Mon, 18 Apr 2016 07:39:54 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Josh Triplett <josh@...htriplett.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	"Richard W.M. Jones" <rjones@...hat.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	mingo@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	luto@...nel.org, viro@...iv.linux.org.uk, zab <zab@...hat.com>,
	emunson@...mai.com,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Pavel Emelyanov <xemul@...allels.com>, sfr@...b.auug.org.au,
	Milosz Tanski <milosz@...in.com>,
	rostedt <rostedt@...dmis.org>, arnd@...db.de,
	ebiederm@...ssion.com, gorcunov <gorcunov@...nvz.org>,
	iulia manda21 <iulia.manda21@...il.com>,
	dave hansen <dave.hansen@...ux.intel.com>,
	mguzik <mguzik@...hat.com>, adobriyan@...il.com,
	Davidlohr Bueso <dave@...olabs.net>,
	linux-api <linux-api@...r.kernel.org>, gorcunov@...il.com,
	fw@...eb.enyo.de, Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2 0/2] vfs: Define new syscall getumask.

On Sun, Apr 17, 2016 at 08:00:54PM -0700, H. Peter Anvin wrote:
> Now, we could of course have __linux_getrandom() and make a weak alias
> for getrandom(), but I really don't understand the use case for
> exporting all the system calls.

If we do create a libinux library, I'd definitely want getrandom(2) to
be defined as getrandom(), and not as sys_getrandom() or
linux_getrandom().

For bonus points we could also define a OpenBSD compatible
getentropy() interface so that programs that were already written to
use the OpenBSD interface (and perhaps have a configure test for it
already) would get the benefits of the getrandom(2) system call
immediately.

						- Ted