The patch titled
Subject: mips: switch to generic version of pte allocation
has been added to the -mm tree. Its filename is
mips-switch-to-generic-version-of-pte-allocation.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mips-switch-to-generic-version-of-pte-allocation.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mips-switch-to-generic-version-of-pte-allocation.patch
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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: mips: switch to generic version of pte allocation
MIPS allocates kernel PTE pages with
__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER)
and user PTE pages with
pte = alloc_pages(GFP_KERNEL, PTE_ORDER)
and then uses clear_highpage(pte) to zero out the allocated page for the
user page tables.
The PTE_ORDER is hardwired to zero, which makes MIPS implementation almost
identical to the generic one.
Switch MIPS to the generic version that does exactly the same thing for the
kernel page tables and adds __GFP_ACCOUNT for the user PTEs.
The pte_free_kernel() and pte_free() versions on mips are identical to the
generic ones and can be simply dropped.
Link: http://lkml.kernel.org/r/1557296232-15361-9-git-send-email-rppt@xxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Paul Burton <paul.burton@xxxxxxxx>
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: 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/mips/include/asm/pgalloc.h | 33 +-----------------------------
1 file changed, 2 insertions(+), 31 deletions(-)
--- a/arch/mips/include/asm/pgalloc.h~mips-switch-to-generic-version-of-pte-allocation
+++ a/arch/mips/include/asm/pgalloc.h
@@ -13,6 +13,8 @@
#include <linux/mm.h>
#include <linux/sched.h>
+#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
+
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
pte_t *pte)
{
@@ -50,37 +52,6 @@ static inline void pgd_free(struct mm_st
free_pages((unsigned long)pgd, PGD_ORDER);
}
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
-{
- return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER);
-}
-
-static inline struct page *pte_alloc_one(struct mm_struct *mm)
-{
- struct page *pte;
-
- pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
- if (!pte)
- return NULL;
- clear_highpage(pte);
- if (!pgtable_page_ctor(pte)) {
- __free_page(pte);
- return NULL;
- }
- return pte;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
- free_pages((unsigned long)pte, PTE_ORDER);
-}
-
-static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
-{
- pgtable_page_dtor(pte);
- __free_pages(pte, PTE_ORDER);
-}
-
#define __pte_free_tlb(tlb,pte,address) \
do { \
pgtable_page_dtor(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
