[12/13] mm: cleanup the hmm_vma_walk_hugetlb_entry stub

Submitted by Christoph Hellwig on July 30, 2019, 5:52 a.m.

Details

Message ID 20190730055203.28467-13-hch@lst.de
State New
Headers show
Series "Series without cover letter" ( rev: 1 ) in Nouveau

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Commit Message

Christoph Hellwig July 30, 2019, 5:52 a.m.
Stub out the whole function and assign NULL to the .hugetlb_entry method
if CONFIG_HUGETLB_PAGE is not set, as the method won't ever be called in
that case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 mm/hmm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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diff --git a/mm/hmm.c b/mm/hmm.c
index f4e90ea5779f..2b56a4af1001 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -769,11 +769,11 @@  static int hmm_vma_walk_pud(pud_t *pudp, unsigned long start, unsigned long end,
 #define hmm_vma_walk_pud	NULL
 #endif
 
+#ifdef CONFIG_HUGETLB_PAGE
 static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask,
 				      unsigned long start, unsigned long end,
 				      struct mm_walk *walk)
 {
-#ifdef CONFIG_HUGETLB_PAGE
 	unsigned long addr = start, i, pfn;
 	struct hmm_vma_walk *hmm_vma_walk = walk->private;
 	struct hmm_range *range = hmm_vma_walk->range;
@@ -812,10 +812,10 @@  static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask,
 		return hmm_vma_walk_hole_(addr, end, fault, write_fault, walk);
 
 	return ret;
-#else /* CONFIG_HUGETLB_PAGE */
-	return -EINVAL;
-#endif
 }
+#else
+#define hmm_vma_walk_hugetlb_entry NULL
+#endif /* CONFIG_HUGETLB_PAGE */
 
 static void hmm_pfns_clear(struct hmm_range *range,
 			   uint64_t *pfns,

Comments

On Tue, Jul 30, 2019 at 08:52:02AM +0300, Christoph Hellwig wrote:
> Stub out the whole function and assign NULL to the .hugetlb_entry method
> if CONFIG_HUGETLB_PAGE is not set, as the method won't ever be called in
> that case.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  mm/hmm.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>

Jason