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| author |   Simon Budig <simon.budig@kernelconcepts.de> | 2011-07-04 19:56:01 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-07-04 20:03:40 -0700 |
| commit | 7bed4b2c97d548c652ada6111604568ea6b0c423 (patch) | |
| tree | 4d6ddf8d13638ea0cb8461b21c9b35860bf3037a /include/linux/input.h | |
| parent | Input: wm97xx - mark channels which need pen_down (diff) | |
| download | linux-dev-7bed4b2c97d548c652ada6111604568ea6b0c423.tar.xz linux-dev-7bed4b2c97d548c652ada6111604568ea6b0c423.zip | |
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 '')
| -rw-r--r-- | include/linux/input.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/input.h b/include/linux/input.h index 771d6d85667d..068784e17972 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 */ |