From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (bilbo.ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3zVGNC4d4zzDqlb for ; Mon, 29 Jan 2018 15:13:47 +1100 (AEDT) In-Reply-To: <1509666992-4649-1-git-send-email-mpe@ellerman.id.au> To: Michael Ellerman , linuxppc-dev@ozlabs.org From: Michael Ellerman Subject: Re: powerpc/cell: Remove axonram driver Message-Id: <3zVGNB6s1Vz9t2c@ozlabs.org> Date: Mon, 29 Jan 2018 15:13:46 +1100 (AEDT) List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2017-11-02 at 23:56:32 UTC, Michael Ellerman wrote: > The QS21/22 IBM Cell blades had a southbridge chip called Axon. This > could have DDR DIMMs attached to it, though they were not directly > usable as RAM, instead they could be used as some sort of buffer, if > applications were written specifically to use the block device > provided by the driver. > > Although the driver supposedly had direct access support, it was > apparently never tested (see commit 91117a20245b ("axonram: Fix bug in > direct_access")). > > These machines have not been available for over 5 years, and were > never widely in use. It seems highly unlikely anyone is using this > driver. > > In general we're happy to leave old drivers in the tree, but because > DAX is involved this driver is caught up in the ongoing work in that > area, but none of the DAX folks are able to test it. > > So remove the driver, if any one *is* using it, we'll be happy to put > it back. > > Signed-off-by: Michael Ellerman Applied to powerpc next. https://git.kernel.org/powerpc/c/1d65b1c886be6111f2347bd1a548be cheers