diff options
author | Mike Rapoport <rppt@linux.ibm.com> | 2020-06-08 21:33:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 09:39:13 -0700 |
commit | e05c7b1f2bc4b7b28199b9a7572f73436d97317e (patch) | |
tree | e0aafcf941689ba227fe55e2af9e915925c812cd /arch/s390/mm | |
parent | 88107d330de4f175705a3ea03147feb0d7e68499 (diff) |
mm: pgtable: add shortcuts for accessing kernel PMD and PTE
The powerpc 32-bit implementation of pgtable has nice shortcuts for
accessing kernel PMD and PTE for a given virtual address. Make these
helpers available for all architectures.
[rppt@linux.ibm.com: microblaze: fix page table traversal in setup_rt_frame()]
Link: http://lkml.kernel.org/r/20200518191511.GD1118872@kernel.org
[akpm@linux-foundation.org: s/pmd_ptr_k/pmd_off_k/ in various powerpc places]
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
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: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-9-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r-- | arch/s390/mm/pageattr.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index 732c12145d04..397944b9906b 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -337,19 +337,11 @@ void __kernel_map_pages(struct page *page, int numpages, int enable) { unsigned long address; int nr, i, j; - pgd_t *pgd; - p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; pte_t *pte; for (i = 0; i < numpages;) { address = page_to_phys(page + i); - pgd = pgd_offset_k(address); - p4d = p4d_offset(pgd, address); - pud = pud_offset(p4d, address); - pmd = pmd_offset(pud, address); - pte = pte_offset_kernel(pmd, address); + pte = virt_to_kpte(address); nr = (unsigned long)pte >> ilog2(sizeof(long)); nr = PTRS_PER_PTE - (nr & (PTRS_PER_PTE - 1)); nr = min(numpages - i, nr); |