[PATCH] mm, thp: fix comment inconsistency for swapin readahead functions

[Ebru Akagunduz]

Signed-off-by: Ebru Akagunduz <ebru.akagunduz@xxxxxxxxx>
---
 mm/huge_memory.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index acd374e..f0d528e 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2436,9 +2436,10 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
 		/* do_swap_page returns VM_FAULT_RETRY with released mmap_sem */
 		if (ret & VM_FAULT_RETRY) {
 			down_read(&mm->mmap_sem);
-			/* vma is no longer available, don't continue to swapin */
-			if (hugepage_vma_revalidate(mm, address))
+			if (hugepage_vma_revalidate(mm, address)) {
+				/* vma is no longer available, don't continue to swapin */
 				return false;
+			}
 		}
 		if (ret & VM_FAULT_ERROR) {
 			trace_mm_collapse_huge_page_swapin(mm, swapped_in, 0);
@@ -2513,8 +2514,8 @@ static void collapse_huge_page(struct mm_struct *mm,
 	if (allocstall == curr_allocstall && swap != 0) {
 		/*
 		 * __collapse_huge_page_swapin always returns with mmap_sem
-		 * locked.  If it fails, release mmap_sem and jump directly
-		 * out.  Continuing to collapse causes inconsistency.
+		 * locked. If it fails, we release mmap_sem and jump out_nolock.
+		 * Continuing to collapse causes inconsistency.
 		 */
 		if (!__collapse_huge_page_swapin(mm, vma, address, pmd)) {
 			mem_cgroup_cancel_charge(new_page, memcg, true);
-- 
1.9.1