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

Message ID 20170302163834.2273519-18-arnd@arndb.de
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Arnd Bergmann March 2, 2017, 4:38 p.m. UTC 
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(-)
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Patch

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);