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

Bharath Vedartham linux.bhar at gmail.com
Sun Aug 18 19:38:55 UTC 2019


is_vm_hugetlb_page will always return false if CONFIG_HUGETLB_PAGE is
not set.

Cc: Ira Weiny <ira.weiny at intel.com>
Cc: John Hubbard <jhubbard at nvidia.com>
Cc: Jérôme Glisse <jglisse at redhat.com>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Dimitri Sivanich <sivanich at sgi.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: William Kucharski <william.kucharski at oracle.com>
Cc: Christoph Hellwig <hch at lst.de>
Cc: linux-kernel at vger.kernel.org
Cc: linux-mm at kvack.org
Cc: linux-kernel-mentees at lists.linuxfoundation.org
Reviewed-by: Ira Weiny <ira.weiny at intel.com>
Reviewed-by: John Hubbard <jhubbard at nvidia.com>
Reviewed-by: William Kucharski <william.kucharski at oracle.com>
Signed-off-by: Bharath Vedartham <linux.bhar at 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



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