• Mike Rapoport's avatar
    alpha: use pgtable-nopud instead of 4level-fixup · a73c9489
    Mike Rapoport authored
    Patch series "mm: remove __ARCH_HAS_4LEVEL_HACK", v13.
    
    These patches convert several architectures to use page table folding
    and remove __ARCH_HAS_4LEVEL_HACK along with
    include/asm-generic/4level-fixup.h.
    
    For the nommu configurations the folding is already implemented by the
    generic code so the only change was to use the appropriate header file.
    
    As for the rest, the changes are mostly about mechanical replacement of
    pgd accessors with pud/pmd ones and the addition of higher levels to
    page table traversals.
    
    With Vineet's patches from "elide extraneous generated code for folded
    p4d/pud/pmd" series [1] there is a small shrink of the kernel size of
    about -0.01% for the defconfig builds.
    
    This patch (of 13):
    
    It is not likely alpha will have 5-level page tables.
    
    Replace usage of include/asm-generic/4level-fixup.h and implied
    __ARCH_HAS_4LEVEL_HACK with include/asm-generic/pgtable-nopud.h and
    adjust page table manipulation macros and functions accordingly.
    
    Link: http://lkml.kernel.org/r/1572938135-31886-2-git-send-email-rppt@kernel.orgSigned-off-by: default avatarMike Rapoport <rppt@linux.ibm.com>
    Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Geert Uytterhoeven <geert@linux-m68k.org>
    Cc: Greentime Hu <green.hu@gmail.com>
    Cc: Greg Ungerer <gerg@linux-m68k.org>
    Cc: Helge Deller <deller@gmx.de>
    Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
    Cc: Jeff Dike <jdike@addtoit.com>
    Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
    Cc: Mark Salter <msalter@redhat.com>
    Cc: Matt Turner <mattst88@gmail.com>
    Cc: Michal Simek <monstr@monstr.eu>
    Cc: Peter Rosin <peda@axentia.se>
    Cc: Richard Weinberger <richard@nod.at>
    Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Sam Creasey <sammy@sammy.net>
    Cc: Vincent Chen <deanbo422@gmail.com>
    Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
    Cc: Anatoly Pugachev <matorola@gmail.com>
    Cc: Russell King <rmk+kernel@armlinux.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    a73c9489
init.c 7.64 KB