diff mbox series

[Linux-kernel-mentees,2/2] sgi-gru: Remove uneccessary ifdef for CONFIG_HUGETLB_PAGE

Message ID 1566157135-9423-3-git-send-email-linux.bhar@gmail.com (mailing list archive)
State New, archived
Headers show
Series get_user_pages changes | expand

Commit Message

Bharath Vedartham Aug. 18, 2019, 7:38 p.m. UTC 
is_vm_hugetlb_page will always return false if CONFIG_HUGETLB_PAGE is
not set.

Cc: Ira Weiny <ira.weiny@intel.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-kernel-mentees@lists.linuxfoundation.org
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
---
 drivers/misc/sgi-gru/grufault.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

Comments

Bharath Vedartham Aug. 18, 2019, 7:51 p.m. UTC | #1 
CC'ing lkml.

On Mon, Aug 19, 2019 at 01:08:55AM +0530, Bharath Vedartham wrote:
> is_vm_hugetlb_page will always return false if CONFIG_HUGETLB_PAGE is
> not set.
> 
> Cc: Ira Weiny <ira.weiny@intel.com>
> Cc: John Hubbard <jhubbard@nvidia.com>
> Cc: Jérôme Glisse <jglisse@redhat.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Dimitri Sivanich <sivanich@sgi.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: William Kucharski <william.kucharski@oracle.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-mm@kvack.org
> Cc: linux-kernel-mentees@lists.linuxfoundation.org
> Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> Reviewed-by: John Hubbard <jhubbard@nvidia.com>
> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
> Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
> ---
>  drivers/misc/sgi-gru/grufault.c | 21 +++++++++++----------
>  1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
> index 61b3447..bce47af 100644
> --- a/drivers/misc/sgi-gru/grufault.c
> +++ b/drivers/misc/sgi-gru/grufault.c
> @@ -180,11 +180,11 @@ static int non_atomic_pte_lookup(struct vm_area_struct *vma,
>  {
>  	struct page *page;
>  
> -#ifdef CONFIG_HUGETLB_PAGE
> -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> -#else
> -	*pageshift = PAGE_SHIFT;
> -#endif
> +	if (unlikely(is_vm_hugetlb_page(vma)))
> +		*pageshift = HPAGE_SHIFT;
> +	else
> +		*pageshift = PAGE_SHIFT;
> +
>  	if (get_user_pages(vaddr, 1, write ? FOLL_WRITE : 0, &page, NULL) <= 0)
>  		return -EFAULT;
>  	*paddr = page_to_phys(page);
> @@ -238,11 +238,12 @@ static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr,
>  		return 1;
>  
>  	*paddr = pte_pfn(pte) << PAGE_SHIFT;
> -#ifdef CONFIG_HUGETLB_PAGE
> -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> -#else
> -	*pageshift = PAGE_SHIFT;
> -#endif
> +
> +	if (unlikely(is_vm_hugetlb_page(vma)))
> +		*pageshift = HPAGE_SHIFT;
> +	else
> +		*pageshift = PAGE_SHIFT;
> +
>  	return 0;
>  
>  err:
> -- 
> 2.7.4
>
Dimitri Sivanich Aug. 19, 2019, 1 p.m. UTC | #2 
Reviewed-by: Dimitri Sivanich <sivanich@hpe.com>

On Mon, Aug 19, 2019 at 01:08:55AM +0530, Bharath Vedartham wrote:
> is_vm_hugetlb_page will always return false if CONFIG_HUGETLB_PAGE is
> not set.
> 
> Cc: Ira Weiny <ira.weiny@intel.com>
> Cc: John Hubbard <jhubbard@nvidia.com>
> Cc: Jérôme Glisse <jglisse@redhat.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Dimitri Sivanich <sivanich@sgi.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: William Kucharski <william.kucharski@oracle.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-mm@kvack.org
> Cc: linux-kernel-mentees@lists.linuxfoundation.org
> Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> Reviewed-by: John Hubbard <jhubbard@nvidia.com>
> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
> Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
> ---
>  drivers/misc/sgi-gru/grufault.c | 21 +++++++++++----------
>  1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
> index 61b3447..bce47af 100644
> --- a/drivers/misc/sgi-gru/grufault.c
> +++ b/drivers/misc/sgi-gru/grufault.c
> @@ -180,11 +180,11 @@ static int non_atomic_pte_lookup(struct vm_area_struct *vma,
>  {
>  	struct page *page;
>  
> -#ifdef CONFIG_HUGETLB_PAGE
> -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> -#else
> -	*pageshift = PAGE_SHIFT;
> -#endif
> +	if (unlikely(is_vm_hugetlb_page(vma)))
> +		*pageshift = HPAGE_SHIFT;
> +	else
> +		*pageshift = PAGE_SHIFT;
> +
>  	if (get_user_pages(vaddr, 1, write ? FOLL_WRITE : 0, &page, NULL) <= 0)
>  		return -EFAULT;
>  	*paddr = page_to_phys(page);
> @@ -238,11 +238,12 @@ static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr,
>  		return 1;
>  
>  	*paddr = pte_pfn(pte) << PAGE_SHIFT;
> -#ifdef CONFIG_HUGETLB_PAGE
> -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> -#else
> -	*pageshift = PAGE_SHIFT;
> -#endif
> +
> +	if (unlikely(is_vm_hugetlb_page(vma)))
> +		*pageshift = HPAGE_SHIFT;
> +	else
> +		*pageshift = PAGE_SHIFT;
> +
>  	return 0;
>  
>  err:
> -- 
> 2.7.4
>
Bharath Vedartham Aug. 19, 2019, 7:07 p.m. UTC | #3 
On Mon, Aug 19, 2019 at 08:00:57AM -0500, Dimitri Sivanich wrote:
> Reviewed-by: Dimitri Sivanich <sivanich@hpe.com>
Thanks! 
> On Mon, Aug 19, 2019 at 01:08:55AM +0530, Bharath Vedartham wrote:
> > is_vm_hugetlb_page will always return false if CONFIG_HUGETLB_PAGE is
> > not set.
> > 
> > Cc: Ira Weiny <ira.weiny@intel.com>
> > Cc: John Hubbard <jhubbard@nvidia.com>
> > Cc: Jérôme Glisse <jglisse@redhat.com>
> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Cc: Dimitri Sivanich <sivanich@sgi.com>
> > Cc: Arnd Bergmann <arnd@arndb.de>
> > Cc: William Kucharski <william.kucharski@oracle.com>
> > Cc: Christoph Hellwig <hch@lst.de>
> > Cc: linux-kernel@vger.kernel.org
> > Cc: linux-mm@kvack.org
> > Cc: linux-kernel-mentees@lists.linuxfoundation.org
> > Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> > Reviewed-by: John Hubbard <jhubbard@nvidia.com>
> > Reviewed-by: William Kucharski <william.kucharski@oracle.com>
> > Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
> > ---
> >  drivers/misc/sgi-gru/grufault.c | 21 +++++++++++----------
> >  1 file changed, 11 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
> > index 61b3447..bce47af 100644
> > --- a/drivers/misc/sgi-gru/grufault.c
> > +++ b/drivers/misc/sgi-gru/grufault.c
> > @@ -180,11 +180,11 @@ static int non_atomic_pte_lookup(struct vm_area_struct *vma,
> >  {
> >  	struct page *page;
> >  
> > -#ifdef CONFIG_HUGETLB_PAGE
> > -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> > -#else
> > -	*pageshift = PAGE_SHIFT;
> > -#endif
> > +	if (unlikely(is_vm_hugetlb_page(vma)))
> > +		*pageshift = HPAGE_SHIFT;
> > +	else
> > +		*pageshift = PAGE_SHIFT;
> > +
> >  	if (get_user_pages(vaddr, 1, write ? FOLL_WRITE : 0, &page, NULL) <= 0)
> >  		return -EFAULT;
> >  	*paddr = page_to_phys(page);
> > @@ -238,11 +238,12 @@ static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr,
> >  		return 1;
> >  
> >  	*paddr = pte_pfn(pte) << PAGE_SHIFT;
> > -#ifdef CONFIG_HUGETLB_PAGE
> > -	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
> > -#else
> > -	*pageshift = PAGE_SHIFT;
> > -#endif
> > +
> > +	if (unlikely(is_vm_hugetlb_page(vma)))
> > +		*pageshift = HPAGE_SHIFT;
> > +	else
> > +		*pageshift = PAGE_SHIFT;
> > +
> >  	return 0;
> >  
> >  err:
> > -- 
> > 2.7.4
> >
diff mbox series

Patch

diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 61b3447..bce47af 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -180,11 +180,11 @@  static int non_atomic_pte_lookup(struct vm_area_struct *vma,
 {
 	struct page *page;
 
-#ifdef CONFIG_HUGETLB_PAGE
-	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
-#else
-	*pageshift = PAGE_SHIFT;
-#endif
+	if (unlikely(is_vm_hugetlb_page(vma)))
+		*pageshift = HPAGE_SHIFT;
+	else
+		*pageshift = PAGE_SHIFT;
+
 	if (get_user_pages(vaddr, 1, write ? FOLL_WRITE : 0, &page, NULL) <= 0)
 		return -EFAULT;
 	*paddr = page_to_phys(page);
@@ -238,11 +238,12 @@  static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr,
 		return 1;
 
 	*paddr = pte_pfn(pte) << PAGE_SHIFT;
-#ifdef CONFIG_HUGETLB_PAGE
-	*pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
-#else
-	*pageshift = PAGE_SHIFT;
-#endif
+
+	if (unlikely(is_vm_hugetlb_page(vma)))
+		*pageshift = HPAGE_SHIFT;
+	else
+		*pageshift = PAGE_SHIFT;
+
 	return 0;
 
 err: