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authorChristoph Hellwig <hch@lst.de>2019-08-06 19:05:49 +0300
committerJason Gunthorpe <jgg@mellanox.com>2019-08-07 20:58:06 +0300
commit9d3973d60f0abd3985229bd895f45e2b8974344c (patch)
tree501783ad7739a3daca4fcb0801db4ff3ed52313a /mm/hmm.c
parentf0b3c45c8931fd7448a638557752f2743f76f51a (diff)
downloadlinux-9d3973d60f0abd3985229bd895f45e2b8974344c.tar.xz
mm/hmm: cleanup the hmm_vma_handle_pmd stub
Stub out the whole function when CONFIG_TRANSPARENT_HUGEPAGE is not set to make the function easier to read. Link: https://lore.kernel.org/r/20190806160554.14046-12-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'mm/hmm.c')
-rw-r--r--mm/hmm.c18
1 files changed, 8 insertions, 10 deletions
diff --git a/mm/hmm.c b/mm/hmm.c
index fb1306409258..900cb4837315 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -456,13 +456,10 @@ 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;
unsigned long pfn, npages, i;
@@ -493,11 +490,12 @@ static int hmm_vma_handle_pmd(struct mm_walk *walk,
}
hmm_vma_walk->last = end;
return 0;
-#else
- /* If THP is not enabled then we should never reach this code ! */
- return -EINVAL;
-#endif
}
+#else /* CONFIG_TRANSPARENT_HUGEPAGE */
+/* stub to allow the code below to compile */
+int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr,
+ unsigned long end, uint64_t *pfns, pmd_t pmd);
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
static inline uint64_t pte_to_hmm_pfn_flags(struct hmm_range *range, pte_t pte)
{