[PATCH 3/3] media: go7007: avoid clang frame overflow warning with KASAN

[Arnd Bergmann]

clang-8 warns about one function here when KASAN is enabled, even
without the 'asan-stack' option:

drivers/media/usb/go7007/go7007-fw.c:1551:5: warning: stack frame size of 2656 bytes in function

I have reported this issue in the llvm bugzilla, but to make
it work with the clang-8 release, a small annotation is still
needed.

Link: https://bugs.llvm.org/show_bug.cgi?id=38809
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/media/usb/go7007/go7007-fw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/go7007/go7007-fw.c b/drivers/media/usb/go7007/go7007-fw.c
index 24f5b615dc7a..c7201e93c331 100644
--- a/drivers/media/usb/go7007/go7007-fw.c
+++ b/drivers/media/usb/go7007/go7007-fw.c
@@ -1499,7 +1499,7 @@ static int modet_to_package(struct go7007 *go, __le16 *code, int space)
 	return cnt;
 }
 
-static int do_special(struct go7007 *go, u16 type, __le16 *code, int space,
+static noinline_for_stack int do_special(struct go7007 *go, u16 type, __le16 *code, int space,
 			int *framelen)
 {
 	switch (type) {
-- 
2.20.0