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authorSimon Budig <simon.budig@kernelconcepts.de>2011-07-04 19:56:01 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-07-04 20:03:40 -0700
commit7bed4b2c97d548c652ada6111604568ea6b0c423 (patch)
tree4d6ddf8d13638ea0cb8461b21c9b35860bf3037a /include/linux/input.h
parent77da38387e1c6f473744afccd83795805f506498 (diff)
downloadop-kernel-dev-7bed4b2c97d548c652ada6111604568ea6b0c423.zip
op-kernel-dev-7bed4b2c97d548c652ada6111604568ea6b0c423.tar.gz
Input: add guarding parentheses to macros
Put parentheses around macro argument uses. This avoids pitfalls for the programmer, where the argument expansion does not give the expected result, for example: ioctl (fd, EVIOCGABS (have_mt ? ABS_MT_POSITION_X : ABS_X), &abs); Signed-off-by: Simon Budig <simon.budig@kernelconcepts.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/input.h')
-rw-r--r--include/linux/input.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/input.h b/include/linux/input.h
index 771d6d8..068784e 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -119,9 +119,9 @@ struct input_keymap_entry {
#define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */
#define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */
-#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + ev, len) /* get event bits */
-#define EVIOCGABS(abs) _IOR('E', 0x40 + abs, struct input_absinfo) /* get abs value/limits */
-#define EVIOCSABS(abs) _IOW('E', 0xc0 + abs, struct input_absinfo) /* set abs value/limits */
+#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + (ev), len) /* get event bits */
+#define EVIOCGABS(abs) _IOR('E', 0x40 + (abs), struct input_absinfo) /* get abs value/limits */
+#define EVIOCSABS(abs) _IOW('E', 0xc0 + (abs), struct input_absinfo) /* set abs value/limits */
#define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
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