lkml.org 
[lkml]   [2018]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/8] Uprobe: Export vaddr <-> offset conversion functions
On Tue, Mar 13, 2018 at 06:25:56PM +0530, Ravi Bangoria wrote:
> No functionality changes.
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>

Reviewed-by: Jérôme Glisse <jglisse@redhat.com>

> ---
> include/linux/mm.h | 12 ++++++++++++
> kernel/events/uprobes.c | 10 ----------
> 2 files changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index ad06d42..95909f2 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2274,6 +2274,18 @@ struct vm_unmapped_area_info {
> return unmapped_area(info);
> }
>
> +static inline unsigned long
> +offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
> +{
> + return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
> +}
> +
> +static inline loff_t
> +vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
> +{
> + return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start);
> +}
> +
> /* truncate.c */
> extern void truncate_inode_pages(struct address_space *, loff_t);
> extern void truncate_inode_pages_range(struct address_space *,
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index ce6848e..bd6f230 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -130,16 +130,6 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
> return vma->vm_file && (vma->vm_flags & flags) == VM_MAYEXEC;
> }
>
> -static unsigned long offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
> -{
> - return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
> -}
> -
> -static loff_t vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
> -{
> - return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start);
> -}
> -
> /**
> * __replace_page - replace page in vma by new page.
> * based on replace_page in mm/ksm.c
> --
> 1.8.3.1
>

\
 
 \ /
  Last update: 2018-03-13 21:37    [W:0.363 / U:0.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site