mm/shmem.c: mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Link: http://lkml.kernel.org/r/20171020191058.GA24427@embeddedor.com
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/shmem.c b/mm/shmem.c
index d6947d21f66c5c5dd6d136b64216d810e0ce75bd..ab22eaa2412eac0ef6c0bc434ed56b81cfe19432 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4098,6 +4098,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
                        if (i_size >= HPAGE_PMD_SIZE &&
                                        i_size >> PAGE_SHIFT >= off)
                                return true;
+                       /* fall through */
                case SHMEM_HUGE_ADVISE:
                        /* TODO: implement fadvise() hints */
                        return (vma->vm_flags & VM_HUGEPAGE);