[PATCH] mm/thp: make set_huge_zero_page() return void

From: Ralph Campbell <rcampbell@nvidia.com>
To: <linux-mm@kvack.org>
Cc: <linux-kernel@vger.kernel.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ralph Campbell <rcampbell@nvidia.com>
Subject: [PATCH] mm/thp: make set_huge_zero_page() return void
Date: Mon, 30 Sep 2019 12:55:28 -0700	[thread overview]
Message-ID: <20190930195528.32553-1-rcampbell@nvidia.com> (raw)

The return value from set_huge_zero_page() is never checked so simplify
the code by making it return void.

Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
---
 mm/huge_memory.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c5cb6dcd6c69..6cf0ee65538d 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -686,20 +686,18 @@ static inline gfp_t alloc_hugepage_direct_gfpmask(struct vm_area_struct *vma)
 }
 
 /* Caller must hold page table lock. */
-static bool set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm,
+static void set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm,
 		struct vm_area_struct *vma, unsigned long haddr, pmd_t *pmd,
 		struct page *zero_page)
 {
 	pmd_t entry;
-	if (!pmd_none(*pmd))
-		return false;
+
 	entry = mk_pmd(zero_page, vma->vm_page_prot);
 	entry = pmd_mkhuge(entry);
 	if (pgtable)
 		pgtable_trans_huge_deposit(mm, pmd, pgtable);
 	set_pmd_at(mm, haddr, pmd, entry);
 	mm_inc_nr_ptes(mm);
-	return true;
 }
 
 vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf)
-- 
2.20.1

