releases/4.4.181/media-go7007-avoid-clang-frame-overflow-warning-with.patch

   1 From b542c9f167481af14ea715399d9277ecd5f9c48d Mon Sep 17 00:00:00 2001
   2 From: Arnd Bergmann <arnd@arndb.de>
   3 Date: Tue, 19 Feb 2019 12:01:58 -0500
   4 Subject: media: go7007: avoid clang frame overflow warning with KASAN
   5
   6 [ Upstream commit ed713a4a1367aca5c0f2f329579465db00c17995 ]
   7
   8 clang-8 warns about one function here when KASAN is enabled, even
   9 without the 'asan-stack' option:
  10
  11 drivers/media/usb/go7007/go7007-fw.c:1551:5: warning: stack frame size of 2656 bytes in function
  12
  13 I have reported this issue in the llvm bugzilla, but to make
  14 it work with the clang-8 release, a small annotation is still
  15 needed.
  16
  17 Link: https://bugs.llvm.org/show_bug.cgi?id=38809
  18
  19 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
  20 Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
  21 [hverkuil-cisco@xs4all.nl: fix checkpatch warning]
  22 Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
  23 Signed-off-by: Sasha Levin <sashal@kernel.org>
  24 ---
  25  drivers/media/usb/go7007/go7007-fw.c | 4 ++--
  26  1 file changed, 2 insertions(+), 2 deletions(-)
  27
  28 diff --git a/drivers/media/usb/go7007/go7007-fw.c b/drivers/media/usb/go7007/go7007-fw.c
  29 index 60bf5f0644d11..a5efcd4f7b4f5 100644
  30 --- a/drivers/media/usb/go7007/go7007-fw.c
  31 +++ b/drivers/media/usb/go7007/go7007-fw.c
  32 @@ -1499,8 +1499,8 @@ static int modet_to_package(struct go7007 *go, __le16 *code, int space)
  33         return cnt;
  34  }
  35
  36 -static int do_special(struct go7007 *go, u16 type, __le16 *code, int space,
  37 -                       int *framelen)
  38 +static noinline_for_stack int do_special(struct go7007 *go, u16 type,
  39 +                                        __le16 *code, int space, int *framelen)
  40  {
  41         switch (type) {
  42         case SPECIAL_FRM_HEAD:
  43 --
  44 2.20.1
  45