| Message ID | 20241021130209.15660-2-ansuelsmth@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: dsa: Add Airoha AN8855 support | expand |
diff --git a/include/linux/mdio.h b/include/linux/mdio.h index efeca5bd7600..3f0691dee46a 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -8,6 +8,7 @@ #include <uapi/linux/mdio.h> #include <linux/bitfield.h> +#include <linux/mutex.h> #include <linux/mod_devicetable.h> struct gpio_desc; @@ -25,6 +26,9 @@ enum mdio_mutex_lock_class { MDIO_MUTEX_NESTED, }; +DEFINE_GUARD(mdio_mutex_nested, struct mutex *, + mutex_lock_nested(_T, MDIO_MUTEX_NESTED), mutex_unlock(_T)) + struct mdio_device { struct device dev;
Implement mdio_mutex_nested guard() variant. guard() comes from the cleanup.h API that defines handy class to handle the lifecycle of a critical section. Several drivers use of the mutex_lock_nested()/mutex_unlock() function call pair hence it is sensible to provide a variant of the generic guard(mutex), guard(mdio_mutex_nested) so that drivers can be better supported with the call variant "mutex_lock_nested(..., MDIO_MUTEX_NESTED)" Example usage: guard(mutex_lock_nested)(&bus->mdio_lock) scoped_guard(mutex_lock_nested, &bus->mdio_lock) { ... } Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> --- include/linux/mdio.h | 4 ++++ 1 file changed, 4 insertions(+)