[PATCH] hmm: Suppress compilation warnings when CONFIG_HUGETLB_PAGE is not set

[Jason Gunthorpe <jgg@mellanox.com>]

gcc reports that several variables are defined but not used.

For the first hunk CONFIG_HUGETLB_PAGE the entire if block is already
protected by pud_huge() which is forced to 0. None of the stuff under
the ifdef causes compilation problems as it is already stubbed out in
the header files.

For the second hunk the dummy huge_page_shift macro doesn't touch the
argument, so just inline the argument.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---
 mm/hmm.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index 0db8491090b888..816c2356f2449f 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -797,7 +797,6 @@ static int hmm_vma_walk_pud(pud_t *pudp,
 			return hmm_vma_walk_hole_(addr, end, fault,
 						write_fault, walk);
 
-#ifdef CONFIG_HUGETLB_PAGE
 		pfn = pud_pfn(pud) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
 		for (i = 0; i < npages; ++i, ++pfn) {
 			hmm_vma_walk->pgmap = get_dev_pagemap(pfn,
@@ -813,9 +812,6 @@ static int hmm_vma_walk_pud(pud_t *pudp,
 		}
 		hmm_vma_walk->last = end;
 		return 0;
-#else
-		return -EINVAL;
-#endif
 	}
 
 	split_huge_pud(walk->vma, pudp, addr);
@@ -1024,9 +1020,8 @@ long hmm_range_snapshot(struct hmm_range *range)
 			return -EFAULT;
 
 		if (is_vm_hugetlb_page(vma)) {
-			struct hstate *h = hstate_vma(vma);
-
-			if (huge_page_shift(h) != range->page_shift &&
+			if (huge_page_shift(hstate_vma(vma)) !=
+				    range->page_shift &&
 			    range->page_shift != PAGE_SHIFT)
 				return -EINVAL;
 		} else {
-- 
2.21.0