1 files changed, 5 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 628f96e83b11..429a893b0505 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -305,6 +305,11 @@ static int vmap_range_noflush(unsigned long addr, unsigned long end,
 	int err;
 	pgtbl_mod_mask mask = 0;
 
+	/*
+	 * Might allocate pagetables (for most archs a more precise annotation
+	 * would be might_alloc(GFP_PGTABLE_KERNEL)). Also might shootdown TLB
+	 * (requires IRQs enabled on x86).
+	 */
 	might_sleep();
 	BUG_ON(addr >= end);