| Message ID | 1556810922-20248-10-git-send-email-rppt@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | introduce generic pte_{alloc,free}_one[_kernel] | expand |
Hi Mike, Mike Rapoport <rppt@linux.ibm.com> 於 2019年5月2日 週四 下午11:30寫道： > > The nds32 implementation of pte_alloc_one_kernel() differs from the generic > in the use of __GFP_RETRY_MAYFAIL flag, which is removed after the > conversion. > > The nds32 version of pte_alloc_one() missed the call to pgtable_page_ctor() > and also used __GFP_RETRY_MAYFAIL. Switching it to use generic > __pte_alloc_one() for the PTE page allocation ensures that page table > constructor is run and the user page tables are allocated with > __GFP_ACCOUNT. > > The conversion to the generic version of pte_free_kernel() removes the NULL > check for pte. > > The pte_free() version on nds32 is identical to the generic one and can be > simply dropped. > > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> > --- > arch/nds32/include/asm/pgalloc.h | 31 ++++--------------------------- > 1 file changed, 4 insertions(+), 27 deletions(-) Thanks for your patch. I'm assuming this is going in along with the rest of the patches, so I'm not going to add it to my tree. Acked-by: Greentime Hu <greentime@andestech.com>
diff --git a/arch/nds32/include/asm/pgalloc.h b/arch/nds32/include/asm/pgalloc.h index 3c5fee5..954696c 100644 --- a/arch/nds32/include/asm/pgalloc.h +++ b/arch/nds32/include/asm/pgalloc.h @@ -9,6 +9,9 @@ #include <asm/tlbflush.h> #include <asm/proc-fns.h> +#define __HAVE_ARCH_PTE_ALLOC_ONE +#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ + /* * Since we have only two-level page tables, these are trivial */ @@ -22,22 +25,11 @@ extern void pgd_free(struct mm_struct *mm, pgd_t * pgd); #define check_pgt_cache() do { } while (0) -static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) -{ - pte_t *pte; - - pte = - (pte_t *) __get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | - __GFP_ZERO); - - return pte; -} - static inline pgtable_t pte_alloc_one(struct mm_struct *mm) { pgtable_t pte; - pte = alloc_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO, 0); + pte = __pte_alloc_one(mm, GFP_PGTABLE_USER); if (pte) cpu_dcache_wb_page((unsigned long)page_address(pte)); @@ -45,21 +37,6 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm) } /* - * Free one PTE table. - */ -static inline void pte_free_kernel(struct mm_struct *mm, pte_t * pte) -{ - if (pte) { - free_page((unsigned long)pte); - } -} - -static inline void pte_free(struct mm_struct *mm, pgtable_t pte) -{ - __free_page(pte); -} - -/* * Populate the pmdp entry with a pointer to the pte. This pmd is part * of the mm address space. *
The nds32 implementation of pte_alloc_one_kernel() differs from the generic in the use of __GFP_RETRY_MAYFAIL flag, which is removed after the conversion. The nds32 version of pte_alloc_one() missed the call to pgtable_page_ctor() and also used __GFP_RETRY_MAYFAIL. Switching it to use generic __pte_alloc_one() for the PTE page allocation ensures that page table constructor is run and the user page tables are allocated with __GFP_ACCOUNT. The conversion to the generic version of pte_free_kernel() removes the NULL check for pte. The pte_free() version on nds32 is identical to the generic one and can be simply dropped. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> --- arch/nds32/include/asm/pgalloc.h | 31 ++++--------------------------- 1 file changed, 4 insertions(+), 27 deletions(-)