diff --git a/tools/include/linux/gfp_types.h b/tools/include/linux/gfp_types.h
index 6c75df30a281..54ca0c88bab6 100644
--- a/tools/include/linux/gfp_types.h
+++ b/tools/include/linux/gfp_types.h
@@ -273,17 +273,17 @@ enum {
  *
  * %__GFP_ZERO returns a zeroed page on success.
  *
- * %__GFP_ZEROTAGS zeroes memory tags at allocation time if the memory itself
- * is being zeroed (either via __GFP_ZERO or via init_on_alloc, provided that
- * __GFP_SKIP_ZERO is not set). This flag is intended for optimization: setting
- * memory tags at the same time as zeroing memory has minimal additional
- * performance impact.
+ * %__GFP_ZEROTAGS zeroes memory tags at allocation time. Setting memory tags at
+ * the same time as zeroing memory (e.g., with __GFP_ZERO) has minimal
+ * additional performance impact. However, __GFP_ZEROTAGS also zeroes the tags
+ * even if memory is not getting zeroed at allocation time (e.g.,
+ * with init_on_free).
  *
  * %__GFP_SKIP_KASAN makes KASAN skip unpoisoning on page allocation.
  * Used for userspace and vmalloc pages; the latter are unpoisoned by
- * kasan_unpoison_vmalloc instead. For userspace pages, results in
- * poisoning being skipped as well, see should_skip_kasan_poison for
- * details. Only effective in HW_TAGS mode.
+ * kasan_unpoison_vmalloc instead. If passed to vmalloc, kasan_unpoison_vmalloc
+ * is skipped too. For userspace pages, results in poisoning being skipped as
+ * well, see should_skip_kasan_poison for details. Only effective in HW_TAGS mode.
  */
 #define __GFP_NOWARN	((__force gfp_t)___GFP_NOWARN)
 #define __GFP_COMP	((__force gfp_t)___GFP_COMP)