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

From: Bharath Vedartham <linux.bhar@gmail.com>
To: sivanich@sgi.com, jhubbard@nvidia.com
Cc: jglisse@redhat.com, ira.weiny@intel.com,
	gregkh@linuxfoundation.org, arnd@arndb.de,
	william.kucharski@oracle.com, hch@lst.de,
	inux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel-mentees@lists.linuxfoundation.org,
	Bharath Vedartham <linux.bhar@gmail.com>,
	linux-kernel@vger.kernel.org
Subject: [Linux-kernel-mentees][PATCH 2/2] sgi-gru: Remove uneccessary ifdef for CONFIG_HUGETLB_PAGE
Date: Mon, 19 Aug 2019 01:08:55 +0530	[thread overview]
Message-ID: <1566157135-9423-3-git-send-email-linux.bhar@gmail.com> (raw)
In-Reply-To: <1566157135-9423-1-git-send-email-linux.bhar@gmail.com>

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

