This patch adds the to_power_supply macro to upcast
a device to a power_supply struct.
This is needed because the same piece of code using
container_of is used in various other places, so we
abstract away such low-level operations via a macro.
---
v9:
* Split the pm changes from the thinkpad_acpi patch
into its own patch
v10:
* No changes in this patch in v10
Signed-off-by: Ognjen Galic <smclt30p@xxxxxxxxx>
---
drivers/power/supply/power_supply_core.c | 2 +-
include/linux/power_supply.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 82f998a..feac7b0 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -668,7 +668,7 @@ EXPORT_SYMBOL_GPL(power_supply_powers);
static void power_supply_dev_release(struct device *dev)
{
- struct power_supply *psy = container_of(dev, struct power_supply, dev);
+ struct power_supply *psy = to_power_supply(dev);
dev_dbg(dev, "%s\n", __func__);
kfree(psy);
}
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 79e90b3..f0139b4 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -371,6 +371,8 @@ devm_power_supply_register_no_ws(struct device *parent,
extern void power_supply_unregister(struct power_supply *psy);
extern int power_supply_powers(struct power_supply *psy, struct device *dev);
+#define to_power_supply(device) container_of(device, struct power_supply, dev)
+
extern void *power_supply_get_drvdata(struct power_supply *psy);
/* For APM emulation, think legacy userspace. */
extern struct class *power_supply_class;
--
2.7.4
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