Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Christoph Hellwig <hch@lst.de>
To:     =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= <jglisse@redhat.com>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Ben Skeggs <bskeggs@redhat.com>,
        Felix Kuehling <Felix.Kuehling@amd.com>
Cc:     Ralph Campbell <rcampbell@nvidia.com>, linux-mm@kvack.org,
        nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 11/13] mm: cleanup the hmm_vma_handle_pmd stub
Date:   Tue, 30 Jul 2019 08:52:01 +0300
Message-Id: <20190730055203.28467-12-hch@lst.de>
In-Reply-To: <20190730055203.28467-1-hch@lst.de>
References: <20190730055203.28467-1-hch@lst.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Stub out the whole function when CONFIG_TRANSPARENT_HUGEPAGE is not set
to make the function easier to read.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 mm/hmm.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index 4d3bd41b6522..f4e90ea5779f 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -455,13 +455,10 @@ static inline uint64_t pmd_to_hmm_pfn_flags(struct hmm_range *range, pmd_t pmd)
 				range->flags[HMM_PFN_VALID];
 }
 
-static int hmm_vma_handle_pmd(struct mm_walk *walk,
-			      unsigned long addr,
-			      unsigned long end,
-			      uint64_t *pfns,
-			      pmd_t pmd)
-{
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr,
+		unsigned long end, uint64_t *pfns, pmd_t pmd)
+{
 	struct hmm_vma_walk *hmm_vma_walk = walk->private;
 	struct hmm_range *range = hmm_vma_walk->range;
 	struct dev_pagemap *pgmap = NULL;
@@ -490,11 +487,14 @@ static int hmm_vma_handle_pmd(struct mm_walk *walk,
 		put_dev_pagemap(pgmap);
 	hmm_vma_walk->last = end;
 	return 0;
-#else
-	/* If THP is not enabled then we should never reach this code ! */
+}
+#else /* CONFIG_TRANSPARENT_HUGEPAGE */
+static int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr,
+		unsigned long end, uint64_t *pfns, pmd_t pmd)
+{
 	return -EINVAL;
-#endif
 }
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 static inline uint64_t pte_to_hmm_pfn_flags(struct hmm_range *range, pte_t pte)
 {
-- 
2.20.1