Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
the helper instead to dedup the lines.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 mm/mmap.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 09c563c95112..422f5b9d9660 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -871,9 +871,8 @@ mm_get_unmapped_area(struct mm_struct *mm, struct file *file,
 		     unsigned long addr, unsigned long len,
 		     unsigned long pgoff, unsigned long flags)
 {
-	if (test_bit(MMF_TOPDOWN, &mm->flags))
-		return arch_get_unmapped_area_topdown(file, addr, len, pgoff, flags, 0);
-	return arch_get_unmapped_area(file, addr, len, pgoff, flags, 0);
+	return mm_get_unmapped_area_vmflags(mm, file, addr, len,
+					    pgoff, flags, 0);
 }
 EXPORT_SYMBOL(mm_get_unmapped_area);
 
-- 
2.49.0

On Fri, 13 Jun 2025 09:41:07 -0400
Peter Xu <peterx@redhat.com> wrote:

> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.

Would it make more sense to make it an inline wrapper?
Moving the EXPORT_SYMBOL to mm_get_unmapped_area_vmflags.

	David

> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  mm/mmap.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/mmap.c b/mm/mmap.c
> index 09c563c95112..422f5b9d9660 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -871,9 +871,8 @@ mm_get_unmapped_area(struct mm_struct *mm, struct file *file,
>  		     unsigned long addr, unsigned long len,
>  		     unsigned long pgoff, unsigned long flags)
>  {
> -	if (test_bit(MMF_TOPDOWN, &mm->flags))
> -		return arch_get_unmapped_area_topdown(file, addr, len, pgoff, flags, 0);
> -	return arch_get_unmapped_area(file, addr, len, pgoff, flags, 0);
> +	return mm_get_unmapped_area_vmflags(mm, file, addr, len,
> +					    pgoff, flags, 0);
>  }
>  EXPORT_SYMBOL(mm_get_unmapped_area);
>

On Mon, Jun 16, 2025 at 09:01:34AM +0100, David Laight wrote:
> On Fri, 13 Jun 2025 09:41:07 -0400
> Peter Xu <peterx@redhat.com> wrote:
> 
> > Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> > the helper instead to dedup the lines.
> 
> Would it make more sense to make it an inline wrapper?
> Moving the EXPORT_SYMBOL to mm_get_unmapped_area_vmflags.

Yes, makes sense to me. However that seems to be better justified as a
separate patch.

If you wouldn't mind, I hope we can land the minimum version of the series
first without expanding too much of what it touches.  I already start to
regret having the first two patches, but since I've posted, I'll carry them
as of now.  Please let me know if you have strong feelings.

Thanks a lot for taking a look,

-- 
Peter Xu

On 13.06.25 15:41, Peter Xu wrote:
> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
Acked-by: David Hildenbrand <david@redhat.com>

-- 
Cheers,

David / dhildenb

You've not cc'd maintainers/reviewers of mm/mmap.c, please make sure to do so.

+cc Liam
+cc Vlastimiil
+cc Jann
+cc Pedro

...!

On Fri, Jun 13, 2025 at 09:41:07AM -0400, Peter Xu wrote:
> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>

This looks fine though, so:

Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>

> ---
>  mm/mmap.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/mm/mmap.c b/mm/mmap.c
> index 09c563c95112..422f5b9d9660 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -871,9 +871,8 @@ mm_get_unmapped_area(struct mm_struct *mm, struct file *file,
>  		     unsigned long addr, unsigned long len,
>  		     unsigned long pgoff, unsigned long flags)
>  {
> -	if (test_bit(MMF_TOPDOWN, &mm->flags))
> -		return arch_get_unmapped_area_topdown(file, addr, len, pgoff, flags, 0);
> -	return arch_get_unmapped_area(file, addr, len, pgoff, flags, 0);
> +	return mm_get_unmapped_area_vmflags(mm, file, addr, len,
> +					    pgoff, flags, 0);
>  }
>  EXPORT_SYMBOL(mm_get_unmapped_area);
>
> --
> 2.49.0
>

On Fri, Jun 13, 2025 at 04:57:12PM +0100, Lorenzo Stoakes wrote:
> You've not cc'd maintainers/reviewers of mm/mmap.c, please make sure to do so.
> 
> +cc Liam
> +cc Vlastimiil
> +cc Jann
> +cc Pedro
> 
> ...!
> 
> On Fri, Jun 13, 2025 at 09:41:07AM -0400, Peter Xu wrote:
> > Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> > the helper instead to dedup the lines.
> >
> > Signed-off-by: Peter Xu <peterx@redhat.com>
> 
> This looks fine though, so:
> 
> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>

Reviewed-by: Pedro Falcato <pfalcato@suse.de>

Looks good, thanks!

-- 
Pedro

On 13 Jun 2025, at 9:41, Peter Xu wrote:

> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  mm/mmap.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
Reviewed-by: Zi Yan <ziy@nvidia.com>

Best Regards,
Yan, Zi

On Fri, Jun 13, 2025 at 09:41:07AM -0400, Peter Xu wrote:
> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>

Reviewed-by: Oscar Salvador <osalvador@suse.de>


-- 
Oscar Salvador
SUSE Labs

On Fri, Jun 13, 2025 at 09:41:07AM -0400, Peter Xu wrote:
> Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
> the helper instead to dedup the lines.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  mm/mmap.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Jason