diff options
| author |   Dan Gopstein <dgopstein@nyu.edu> | 2017-12-25 16:16:14 -0500 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-06 04:08:17 -0500 |
| commit | 7aa92c4229fefff0cab6930cf977f4a0e3e606d8 (patch) | |
| tree | 31f5e43b03e4837db5eff1dc04ed477d2bfdaf43 /drivers/media/dvb-frontends/dibx000_common.h | |
| parent | media: dvb-frontend/mxl5xx: add support for physical layer scrambling (diff) | |
| download | linux-dev-7aa92c4229fefff0cab6930cf977f4a0e3e606d8.tar.xz linux-dev-7aa92c4229fefff0cab6930cf977f4a0e3e606d8.zip | |
media: ABS macro parameter parenthesization
Replace usages of the locally defined ABS() macro with calls to the
canonical abs() from kernel.h and remove the old definitions of ABS()
This change was originally motivated by two local definitions of the
ABS (absolute value) macro that fail to parenthesize their parameter
properly. This can lead to a bad expansion for low-precedence
expression arguments.
For example: ABS(1-2) currently expands to ((1-2) < 0 ? (-1-2) : (1-2))
which evaluates to -3. But the correct expansion would be
((1-2) < 0 ? -(1-2) : (1-2)) which evaluates to 1.
Signed-off-by: Dan Gopstein <dgopstein@nyu.edu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends/dibx000_common.h')
| -rw-r--r-- | drivers/media/dvb-frontends/dibx000_common.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/dibx000_common.h b/drivers/media/dvb-frontends/dibx000_common.h index 8784af962eba..12b58f5c677d 100644 --- a/drivers/media/dvb-frontends/dibx000_common.h +++ b/drivers/media/dvb-frontends/dibx000_common.h @@ -223,8 +223,6 @@ struct dvb_frontend_parametersContext { #define FE_CALLBACK_TIME_NEVER 0xffffffff -#define ABS(x) ((x < 0) ? (-x) : (x)) - #define DATA_BUS_ACCESS_MODE_8BIT 0x01 #define DATA_BUS_ACCESS_MODE_16BIT 0x02 #define DATA_BUS_ACCESS_MODE_NO_ADDRESS_INCREMENT 0x10 |