tools headers: Sync linux/gfp_types.h with the kernel sources

To pick up the changes in:

  b56ca146a2b27501 ("vmalloc: add __GFP_SKIP_KASAN support")
  6a288a4ddb4a9944 ("mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free")

That just rebuilds perf, silencing this build warning.

This addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/linux/gfp_types.h include/linux/gfp_types.h

Please see tools/include/uapi/README for further details.

Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: Muhammad Usama Anjum <usama.anjum@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/include/linux/gfp_types.h b/tools/include/linux/gfp_types.h
index 6c75df30a281d1316d67a343c7f19eb897ec86f1..54ca0c88bab6e8e774d40264f46100342d696425 100644 (file)
--- 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)