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nds32: use pgtable-nopmd instead of 4level-fixup

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nds32 has only two-level page tables and can use pgtable-nopmd and
folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit
definition of __PAGETABLE_PMD_FOLDED in nds32 with
include/asm-generic/pgtable-nopmd.h and adjust page table manipulation
macros and functions accordingly.

Link: http://lkml.kernel.org/r/1572938135-31886-8-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Anatoly Pugachev <matorola@gmail.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: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Sam Creasey <sammy@sammy.net>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport
2019-12-04 16:54:08 -08:00
committed by Linus Torvalds
parent ed48e1f812
commit 7c2763c423
9 changed files with 47 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
arch/nds32/mm/fault.c
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@@ -31,6 +31,8 @@ void show_pte(struct mm_struct *mm, unsigned long addr)
pr_alert("[%08lx] *pgd=%08lx", addr, pgd_val(*pgd));
do {
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
if (pgd_none(*pgd))
@@ -41,7 +43,9 @@ void show_pte(struct mm_struct *mm, unsigned long addr)
break;
}
pmd = pmd_offset(pgd, addr);
p4d = p4d_offset(pgd, addr);
pud = pud_offset(p4d, addr);
pmd = pmd_offset(pud, addr);
#if PTRS_PER_PMD != 1
pr_alert(", *pmd=%08lx", pmd_val(*pmd));
#endif
@@ -359,6 +363,7 @@ vmalloc_fault:
unsigned int index = pgd_index(addr);
pgd_t *pgd, *pgd_k;
p4d_t *p4d, *p4d_k;
pud_t *pud, *pud_k;
pmd_t *pmd, *pmd_k;
pte_t *pte_k;
@@ -369,8 +374,13 @@ vmalloc_fault:
if (!pgd_present(*pgd_k))
goto no_context;
pud = pud_offset(pgd, addr);
pud_k = pud_offset(pgd_k, addr);
p4d = p4d_offset(pgd, addr);
p4d_k = p4d_offset(pgd_k, addr);
if (!p4d_present(*p4d_k))
goto no_context;
pud = pud_offset(p4d, addr);
pud_k = pud_offset(p4d_k, addr);
if (!pud_present(*pud_k))
goto no_context;