[PATCH 17/26] [media] i2c: ks0127: reduce stack frame size for KASAN

Arnd Bergmann
2017-03-02T16:48:22Z

When CONFIG_KASAN is set, inlining of functions with local variables
causes excessive stack usage:

drivers/media/i2c/ks0127.c: In function 'ks0127_s_routing':
drivers/media/i2c/ks0127.c:541:1: error: the frame size of 3136 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

Marking one functions as noinline_for_kasan solves the problem in this
driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/media/i2c/ks0127.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ks0127.c b/drivers/media/i2c/ks0127.c
index ab536c4a7115..eb2fccdc0602 100644
--- a/drivers/media/i2c/ks0127.c
+++ b/drivers/media/i2c/ks0127.c
@@ -349,7 +349,7 @@ static void ks0127_write(struct v4l2_subdev *sd, u8 reg, u8 val)

/* generic bit-twiddling */
-static void ks0127_and_or(struct v4l2_subdev *sd, u8 reg, u8 and_v, u8 or_v)
+static noinline_for_kasan void ks0127_and_or(struct v4l2_subdev *sd, u8 reg, u8 and_v, u8 or_v)
{
struct ks0127 *ks = to_ks0127(sd);

--
2.9.0