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authorMike Rapoport <rppt@linux.ibm.com>2020-06-08 21:33:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 09:39:14 -0700
commit974b9b2c68f3d35a65e80af9657fe378d2439b60 (patch)
tree67332a4308b56498008ba8687b99c2ca26215866 /arch/nios2
parente05c7b1f2bc4b7b28199b9a7572f73436d97317e (diff)
mm: consolidate pte_index() and pte_offset_*() definitions
All architectures define pte_index() as (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1) and all architectures define pte_offset_kernel() as an entry in the array of PTEs indexed by the pte_index(). For the most architectures the pte_offset_kernel() implementation relies on the availability of pmd_page_vaddr() that converts a PMD entry value to the virtual address of the page containing PTEs array. Let's move x86 definitions of the PTE accessors to the generic place in <linux/pgtable.h> and then simply drop the respective definitions from the other architectures. The architectures that didn't provide pmd_page_vaddr() are updated to have that defined. The generic implementation of pte_offset_kernel() can be overridden by an architecture and alpha makes use of this because it has special ordering requirements for its version of pte_offset_kernel(). [rppt@linux.ibm.com: v2] Link: http://lkml.kernel.org/r/20200514170327.31389-11-rppt@kernel.org [rppt@linux.ibm.com: update] Link: http://lkml.kernel.org/r/20200514170327.31389-12-rppt@kernel.org [rppt@linux.ibm.com: update] Link: http://lkml.kernel.org/r/20200514170327.31389-13-rppt@kernel.org [akpm@linux-foundation.org: fix x86 warning] [sfr@canb.auug.org.au: fix powerpc build] Link: http://lkml.kernel.org/r/20200607153443.GB738695@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> 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/20200514170327.31389-10-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/nios2')
-rw-r--r--arch/nios2/include/asm/pgtable.h22
1 files changed, 4 insertions, 18 deletions
diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h
index f0d4921d05ad..2600d76c310c 100644
--- a/arch/nios2/include/asm/pgtable.h
+++ b/arch/nios2/include/asm/pgtable.h
@@ -102,10 +102,6 @@ static inline void set_pmd(pmd_t *pmdptr, pmd_t pmdval)
*pmdptr = pmdval;
}
-/* to find an entry in a page-table-directory */
-#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
-
static inline int pte_write(pte_t pte) \
{ return pte_val(pte) & _PAGE_WRITE; }
static inline int pte_dirty(pte_t pte) \
@@ -236,27 +232,17 @@ static inline void pte_clear(struct mm_struct *mm,
*/
#define mk_pte(page, prot) (pfn_pte(page_to_pfn(page), prot))
-#define pte_unmap(pte) do { } while (0)
-
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*/
#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd))
#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
-#define pmd_page_vaddr(pmd) pmd_val(pmd)
-
-#define pte_offset_map(dir, addr) \
- ((pte_t *) page_address(pmd_page(*dir)) + \
- (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
-
-/* Get the address to the PTE for a vaddr in specific directory */
-#define pte_offset_kernel(dir, addr) \
- ((pte_t *) pmd_page_vaddr(*(dir)) + \
- (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
+static inline unsigned long pmd_page_vaddr(pmd_t pmd)
+{
+ return pmd_val(pmd);
+}
#define pte_ERROR(e) \
pr_err("%s:%d: bad pte %08lx.\n", \