From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
This code can be compiled when CONFIG_TRANSPARENT_HUGEPAGE is off, so
remove the ifdef.
The function is only ever called under
if (pmd_devmap(pmd) || pmd_trans_huge(pmd))
Which is statically false if !CONFIG_TRANSPARENT_HUGEPAGE, so the compiler
reliably eliminates all of this code.
Reviewed-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Tested-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
---
mm/hmm.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/mm/hmm.c b/mm/hmm.c
index 8dbd9e1d0308b4..3a71ec72b0a42f 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -193,7 +193,6 @@ static inline uint64_t pmd_to_hmm_pfn_flags(struct hmm_range *range, pmd_t pmd)
range->flags[HMM_PFN_VALID];
}
-#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)
{
@@ -216,11 +215,6 @@ static int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr,
hmm_vma_walk->last = end;
return 0;
}
-#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 bool hmm_is_device_private_entry(struct hmm_range *range,
swp_entry_t entry)
--
2.25.2
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