• Kirill A. Shutemov's avatar
    mm: add missing __PAGETABLE_{PUD,PMD}_FOLDED defines · c07af4f1
    Kirill A. Shutemov authored
    Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
    table levels folded.  Usually, these defines are provided by
    <asm-generic/pgtable-nopmd.h> and <asm-generic/pgtable-nopud.h>.
    
    But some architectures fold page table levels in a custom way.  They
    need to define these macros themself.  This patch adds missing defines.
    
    The patch fixes mm->nr_pmds underflow and eliminates dead __pmd_alloc()
    and __pud_alloc() on architectures without these page table levels.
    Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
    Cc: David Howells <dhowells@redhat.com>
    Cc: Geert Uytterhoeven <geert@linux-m68k.org>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Cc: Helge Deller <deller@gmx.de>
    Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
    Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    c07af4f1
pgtable.h 15.9 KB