From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by ml01.01.org (Postfix) with ESMTP id 401C11A1E21 for ; Fri, 24 Jun 2016 14:55:45 -0700 (PDT) Date: Fri, 24 Jun 2016 15:55:12 -0600 From: Ross Zwisler Subject: Re: [PATCH 2/3] mm: Export follow_pte() Message-ID: <20160624215512.GB20730@linux.intel.com> References: <1466523915-14644-1-git-send-email-jack@suse.cz> <1466523915-14644-3-git-send-email-jack@suse.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1466523915-14644-3-git-send-email-jack@suse.cz> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Jan Kara Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@lists.01.org List-ID: On Tue, Jun 21, 2016 at 05:45:14PM +0200, Jan Kara wrote: > DAX will need to implement its own version of check_page_address(). To page_check_address() > avoid duplicating page table walking code, export follow_pte() which > does what we need. > > Signed-off-by: Jan Kara > --- > include/linux/mm.h | 2 ++ > mm/memory.c | 5 +++-- > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 5df5feb49575..989f5d949db3 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1193,6 +1193,8 @@ int copy_page_range(struct mm_struct *dst, struct mm_struct *src, > struct vm_area_struct *vma); > void unmap_mapping_range(struct address_space *mapping, > loff_t const holebegin, loff_t const holelen, int even_cows); > +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, > + spinlock_t **ptlp); > int follow_pfn(struct vm_area_struct *vma, unsigned long address, > unsigned long *pfn); > int follow_phys(struct vm_area_struct *vma, unsigned long address, > diff --git a/mm/memory.c b/mm/memory.c > index 15322b73636b..f6175d63c2e9 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -3647,8 +3647,8 @@ out: > return -EINVAL; > } > > -static inline int follow_pte(struct mm_struct *mm, unsigned long address, > - pte_t **ptepp, spinlock_t **ptlp) > +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, > + spinlock_t **ptlp) > { > int res; > > @@ -3657,6 +3657,7 @@ static inline int follow_pte(struct mm_struct *mm, unsigned long address, > !(res = __follow_pte(mm, address, ptepp, ptlp))); > return res; > } > +EXPORT_SYMBOL(follow_pte); > > /** > * follow_pfn - look up PFN at a user virtual address > -- > 2.6.6 > _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 24 Jun 2016 15:55:12 -0600 From: Ross Zwisler To: Jan Kara Cc: linux-nvdimm@lists.01.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Dan Williams , Ross Zwisler Subject: Re: [PATCH 2/3] mm: Export follow_pte() Message-ID: <20160624215512.GB20730@linux.intel.com> References: <1466523915-14644-1-git-send-email-jack@suse.cz> <1466523915-14644-3-git-send-email-jack@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1466523915-14644-3-git-send-email-jack@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: On Tue, Jun 21, 2016 at 05:45:14PM +0200, Jan Kara wrote: > DAX will need to implement its own version of check_page_address(). To page_check_address() > avoid duplicating page table walking code, export follow_pte() which > does what we need. > > Signed-off-by: Jan Kara > --- > include/linux/mm.h | 2 ++ > mm/memory.c | 5 +++-- > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 5df5feb49575..989f5d949db3 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1193,6 +1193,8 @@ int copy_page_range(struct mm_struct *dst, struct mm_struct *src, > struct vm_area_struct *vma); > void unmap_mapping_range(struct address_space *mapping, > loff_t const holebegin, loff_t const holelen, int even_cows); > +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, > + spinlock_t **ptlp); > int follow_pfn(struct vm_area_struct *vma, unsigned long address, > unsigned long *pfn); > int follow_phys(struct vm_area_struct *vma, unsigned long address, > diff --git a/mm/memory.c b/mm/memory.c > index 15322b73636b..f6175d63c2e9 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -3647,8 +3647,8 @@ out: > return -EINVAL; > } > > -static inline int follow_pte(struct mm_struct *mm, unsigned long address, > - pte_t **ptepp, spinlock_t **ptlp) > +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, > + spinlock_t **ptlp) > { > int res; > > @@ -3657,6 +3657,7 @@ static inline int follow_pte(struct mm_struct *mm, unsigned long address, > !(res = __follow_pte(mm, address, ptepp, ptlp))); > return res; > } > +EXPORT_SYMBOL(follow_pte); > > /** > * follow_pfn - look up PFN at a user virtual address > -- > 2.6.6 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org