[media] media: rc: reduce size of struct ir_raw_event

struct ir_raw_event currently has a size of 12 bytes on most (all?)
architectures. This can be reduced to 8 bytes whilst maintaining
full backwards compatibility.
This saves 2KB in size of struct ir_raw_event_ctrl (as element
kfifo is reduced by 512 * 4 bytes) and it allows to copy the
full struct ir_raw_event with a single 64 bit operation.

Successfully tested with the Nuvoton driver and successfully
compile-tested with the ene_ir driver (as it uses the carrier /
duty_cycle elements).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 0f77b3dffb379bfd4dfe3df7d86d269d0174eaec..b6586a91129cecd8ffb3c59ba7f16d0fb9d92149 100644 (file)
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -215,12 +215,9 @@ enum raw_event_type {
 struct ir_raw_event {
        union {
                u32             duration;
-
-               struct {
-                       u32     carrier;
-                       u8      duty_cycle;
-               };
+               u32             carrier;
        };
+       u8                      duty_cycle;
 
        unsigned                pulse:1;
        unsigned                reset:1;
@@ -228,13 +225,7 @@ struct ir_raw_event {
        unsigned                carrier_report:1;
 };
 
-#define DEFINE_IR_RAW_EVENT(event) \
-       struct ir_raw_event event = { \
-               { .duration = 0 } , \
-               .pulse = 0, \
-               .reset = 0, \
-               .timeout = 0, \
-               .carrier_report = 0 }
+#define DEFINE_IR_RAW_EVENT(event) struct ir_raw_event event = {}
 
 static inline void init_ir_raw_event(struct ir_raw_event *ev)
 {
@@ -256,8 +247,7 @@ void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
 
 static inline void ir_raw_event_reset(struct rc_dev *dev)
 {
-       DEFINE_IR_RAW_EVENT(ev);
-       ev.reset = true;
+       struct ir_raw_event ev = { .reset = true };
 
        ir_raw_event_store(dev, &ev);
        ir_raw_event_handle(dev);