linux-kernel - Re: [PATCH v4 13/13] mm: remove __ARCH_HAS_4LEVEL_HACK and include/asm-generic/4level-fixup.h

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Date:   Tue, 5 Nov 2019 17:13:09 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     linux-mm@...ck.org, Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Helge Deller <deller@....de>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Jeff Dike <jdike@...toit.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mark Salter <msalter@...hat.com>,
        Matt Turner <mattst88@...il.com>,
        Michal Simek <monstr@...str.eu>, Peter Rosin <peda@...ntia.se>,
        Richard Weinberger <richard@....at>,
        Rolf Eike Beer <eike-kernel@...tec.de>,
        Russell King <linux@...linux.org.uk>,
        Sam Creasey <sammy@...my.net>,
        Vincent Chen <deanbo422@...il.com>,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>,
        linux-alpha@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
        linux-kernel@...r.kernel.org, linux-m68k@...r.kernel.org,
        linux-parisc@...r.kernel.org, linux-um@...ts.infradead.org,
        sparclinux@...r.kernel.org, Mike Rapoport <rppt@...ux.ibm.com>
Subject: Re: [PATCH v4 13/13] mm: remove __ARCH_HAS_4LEVEL_HACK and
 include/asm-generic/4level-fixup.h

On Tue,  5 Nov 2019 09:15:35 +0200 Mike Rapoport <rppt@...nel.org> wrote:

> There are no architectures that use include/asm-generic/4level-fixup.h
> therefore it can be removed along with __ARCH_HAS_4LEVEL_HACK define.

Conflicts a bit with Vineet's "asm-generic/tlb: stub out pud_free_tlb()
if nopud ...", from
http://lkml.kernel.org/r/20191016162400.14796-2-vgupta@synopsys.com

I fixed it up by removing include/asm-generic/4level-fixup.h anyway and
removing the removal of "#ifndef __ARCH_HAS_4LEVEL_HAC" from
include/asm-generic/tlb.h.