[PATCH] mm/huge_memory.c: Make __thp_get_unmapped_area static

[PATCH] mm/huge_memory.c: Make __thp_get_unmapped_area static

[Bharath Vedartham]

__thp_get_unmapped_area is only used in mm/huge_memory.c. Make it
static. Tested by building and booting the kernel.

Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
---
 mm/huge_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 165ea46..75fe2b7 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -509,7 +509,7 @@ void prep_transhuge_page(struct page *page)
 	set_compound_page_dtor(page, TRANSHUGE_PAGE_DTOR);
 }
 
-unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
+static unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
 		loff_t off, unsigned long flags, unsigned long size)
 {
 	unsigned long addr;
-- 
2.7.4

Re: [PATCH] mm/huge_memory.c: Make __thp_get_unmapped_area static

[Michal Hocko]

On Sat 04-05-19 15:53:54, Bharath Vedartham wrote:
> __thp_get_unmapped_area is only used in mm/huge_memory.c. Make it
> static.

Makes sense. Looks like an omission.

> Tested by building and booting the kernel.

Testing by git grep __thp_get_unmapped_area would give you a better
picture. Build test migh not hit paths that are config specific and
static aspect of a functions should not have any functionality related
side effects AFAICS.
 
> Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>

Acked-by: Michal Hocko <mhocko@suse.com>

> ---
>  mm/huge_memory.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 165ea46..75fe2b7 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -509,7 +509,7 @@ void prep_transhuge_page(struct page *page)
>  	set_compound_page_dtor(page, TRANSHUGE_PAGE_DTOR);
>  }
>  
> -unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
> +static unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
>  		loff_t off, unsigned long flags, unsigned long size)
>  {
>  	unsigned long addr;
> -- 
> 2.7.4
> 

-- 
Michal Hocko
SUSE Labs

Re: [PATCH] mm/huge_memory.c: Make __thp_get_unmapped_area static

[Bharath Vedartham]

On Sat, May 04, 2019 at 07:54:46AM -0400, Michal Hocko wrote:
Hi Michal,

Thanks for having a look at the patch. 
> On Sat 04-05-19 15:53:54, Bharath Vedartham wrote:
> > __thp_get_unmapped_area is only used in mm/huge_memory.c. Make it
> > static.
> 
> Makes sense. Looks like an omission.
> 
> > Tested by building and booting the kernel.
> 
> Testing by git grep __thp_get_unmapped_area would give you a better
> picture. Build test migh not hit paths that are config specific and
> static aspect of a functions should not have any functionality related
> side effects AFAICS.
>  
I have made sure CONFIG_TRANSPARENT_HUGEPAGE was enabled before building
and booting the kernel. I have also grepped the entire kernel source for
__thp_get_unmapped_area to be very sure.
> > Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
> 
> Acked-by: Michal Hocko <mhocko@suse.com>
> 
> > ---
> >  mm/huge_memory.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> > index 165ea46..75fe2b7 100644
> > --- a/mm/huge_memory.c
> > +++ b/mm/huge_memory.c
> > @@ -509,7 +509,7 @@ void prep_transhuge_page(struct page *page)
> >  	set_compound_page_dtor(page, TRANSHUGE_PAGE_DTOR);
> >  }
> >  
> > -unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
> > +static unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len,
> >  		loff_t off, unsigned long flags, unsigned long size)
> >  {
> >  	unsigned long addr;
> > -- 
> > 2.7.4
> > 
> 
> -- 
> Michal Hocko
> SUSE Labs

Thanks
Bharath