+ m68k-sun3-switch-to-generic-version-of-pte-allocation.patch added to -mm tree

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The patch titled
     Subject: m68k: sun3: switch to generic version of pte allocation
has been added to the -mm tree.  Its filename is
     m68k-sun3-switch-to-generic-version-of-pte-allocation.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/m68k-sun3-switch-to-generic-version-of-pte-allocation.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/m68k-sun3-switch-to-generic-version-of-pte-allocation.patch

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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: m68k: sun3: switch to generic version of pte allocation

The sun3 MMU variant of m68k uses GFP_KERNEL to allocate a PTE page and
then memset(0) or clear_highpage() to clear it.

This is equivalent to allocating the page with GFP_KERNEL | __GFP_ZERO,
which allows replacing sun3 implementation of pte_alloc_one() and
pte_alloc_one_kernel() with the generic ones.

The pte_free() and pte_free_kernel() versions are identical to the generic
ones and can be simply dropped.

Link: http://lkml.kernel.org/r/1557296232-15361-8-git-send-email-rppt@xxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Greentime Hu <green.hu@xxxxxxxxx>
Cc: Guan Xuetao <gxt@xxxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Guo Ren <ren_guo@xxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Ley Foon Tan <lftan@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Paul Burton <paul.burton@xxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Richard Kuo <rkuo@xxxxxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Sam Creasey <sammy@xxxxxxxxx>
Cc: Vincent Chen <deanbo422@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 arch/m68k/include/asm/sun3_pgalloc.h |   41 +------------------------
 1 file changed, 2 insertions(+), 39 deletions(-)

--- a/arch/m68k/include/asm/sun3_pgalloc.h~m68k-sun3-switch-to-generic-version-of-pte-allocation
+++ a/arch/m68k/include/asm/sun3_pgalloc.h
@@ -13,55 +13,18 @@
 
 #include <asm/tlb.h>
 
+#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
+
 extern const char bad_pmd_string[];
 
 #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); })
 
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-        free_page((unsigned long) pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, pgtable_t page)
-{
-	pgtable_page_dtor(page);
-        __free_page(page);
-}
-
 #define __pte_free_tlb(tlb,pte,addr)			\
 do {							\
 	pgtable_page_dtor(pte);				\
 	tlb_remove_page((tlb), pte);			\
 } while (0)
 
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
-{
-	unsigned long page = __get_free_page(GFP_KERNEL);
-
-	if (!page)
-		return NULL;
-
-	memset((void *)page, 0, PAGE_SIZE);
-	return (pte_t *) (page);
-}
-
-static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
-{
-        struct page *page = alloc_pages(GFP_KERNEL, 0);
-
-	if (page == NULL)
-		return NULL;
-
-	clear_highpage(page);
-	if (!pgtable_page_ctor(page)) {
-		__free_page(page);
-		return NULL;
-	}
-	return page;
-
-}
-
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 {
 	pmd_val(*pmd) = __pa((unsigned long)pte);
_

Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are

mm-gup-continue-vm_fault_retry-processing-event-for-pre-faults.patch
arm-remove-arch_select_memory_model.patch
s390-remove-arch_select_memory_model.patch
sparc-remove-arch_select_memory_model.patch
asm-generic-x86-introduce-generic-pte_allocfree_one.patch
alpha-switch-to-generic-version-of-pte-allocation.patch
arm-switch-to-generic-version-of-pte-allocation.patch
arm64-switch-to-generic-version-of-pte-allocation.patch
csky-switch-to-generic-version-of-pte-allocation.patch
m68k-sun3-switch-to-generic-version-of-pte-allocation.patch
mips-switch-to-generic-version-of-pte-allocation.patch
nds32-switch-to-generic-version-of-pte-allocation.patch
nios2-switch-to-generic-version-of-pte-allocation.patch
parisc-switch-to-generic-version-of-pte-allocation.patch
riscv-switch-to-generic-version-of-pte-allocation.patch
um-switch-to-generic-version-of-pte-allocation.patch
unicore32-switch-to-generic-version-of-pte-allocation.patch




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