diff options
| author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-10-11 15:29:46 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-10-11 15:32:11 -0400 |
| commit | 8382e556b1a2f30c4bf866f021b33577a64f9ebf (patch) | |
| tree | cf496d579e34e0d49c59a999a104bb8ba40e4060 | |
| parent | 01153bf04db18d5fcd30df64ffe428db7ff7bada (diff) | |
Simplify major/minor non-dynamic logic
changeset 6bbf7a855d20 ("media: dvbdev: convert DVB device types into an enum")
added a new warning on gcc 6:
>> drivers/media/dvb-core/dvbdev.c:86:1: warning: control reaches end of non-void function [-Wreturn-type]
That's because gcc is not smart enough to see that all types are
present at the switch. Also, the current code is not too optimized.
So, replace it to a more optimized one, based on a static table.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 6bbf7a855d20 ("media: dvbdev: convert DVB device types into an enum")
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | drivers/media/dvb-core/dvbdev.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c index a53eb53a4fd5..060c60ddfcc3 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -68,22 +68,20 @@ static const char * const dnames[] = { #else #define DVB_MAX_IDS 4 -static int nums2minor(int num, enum dvb_device_type type, int id) -{ - int n = (num << 6) | (id << 4); +static const u8 minor_type[] = { + [DVB_DEVICE_VIDEO] = 0, + [DVB_DEVICE_AUDIO] = 1, + [DVB_DEVICE_SEC] = 2, + [DVB_DEVICE_FRONTEND] = 3, + [DVB_DEVICE_DEMUX] = 4, + [DVB_DEVICE_DVR] = 5, + [DVB_DEVICE_CA] = 6, + [DVB_DEVICE_NET] = 7, + [DVB_DEVICE_OSD] = 8, +}; - switch (type) { - case DVB_DEVICE_VIDEO: return n; - case DVB_DEVICE_AUDIO: return n | 1; - case DVB_DEVICE_SEC: return n | 2; - case DVB_DEVICE_FRONTEND: return n | 3; - case DVB_DEVICE_DEMUX: return n | 4; - case DVB_DEVICE_DVR: return n | 5; - case DVB_DEVICE_CA: return n | 6; - case DVB_DEVICE_NET: return n | 7; - case DVB_DEVICE_OSD: return n | 8; - } -} +#define nums2minor(num, type, id) \ + (((num) << 6) | ((id) << 4) | minor_type[type]) #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) #endif |