+ kasan-fix-build-by-including-kernelh.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: kasan: fix build by including kernel.h
has been added to the -mm tree.  Its filename is
     kasan-fix-build-by-including-kernelh.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-fix-build-by-including-kernelh.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-fix-build-by-including-kernelh.patch

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------------------------------------------------------
From: Marco Elver <elver@google.com>
Subject: kasan: fix build by including kernel.h

The <linux/kasan.h> header relies on _RET_IP_ being defined, and had been
receiving that definition via inclusion of bug.h which includes kernel.h. 
However, since f39650de687e ("kernel.h: split out panic and oops helpers")
that is no longer the case and get the following build error when building
CONFIG_KASAN_HW_TAGS on arm64:

  In file included from arch/arm64/mm/kasan_init.c:10:
  ./include/linux/kasan.h: In function 'kasan_slab_free':
  ./include/linux/kasan.h:230:39: error: '_RET_IP_' undeclared (first use in this function)
    230 |   return __kasan_slab_free(s, object, _RET_IP_, init);

Fix it by including kernel.h from kasan.h.

Link: https://lkml.kernel.org/r/20210705072716.2125074-1-elver@google.com
Fixes: f39650de687e ("kernel.h: split out panic and oops helpers")
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/kasan.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/linux/kasan.h~kasan-fix-build-by-including-kernelh
+++ a/include/linux/kasan.h
@@ -3,6 +3,7 @@
 #define _LINUX_KASAN_H
 
 #include <linux/bug.h>
+#include <linux/kernel.h>
 #include <linux/static_key.h>
 #include <linux/types.h>
 
_

Patches currently in -mm which might be from elver@google.com are

mm-move-helper-to-check-slub_debug_enabled.patch
kasan-fix-build-by-including-kernelh.patch