On Wed, 2022-09-21 at 13:33 -0600, jim.cromie@xxxxxxxxx wrote:
> difference between DECLARE_* and DEFINE_* macro namespaces ?
I am not sure there is a clear difference any more nowadays.
Both DECLARE_* and DEFINE_* seem to be used for both defining
a type and declaring an (often initialized) instance of that type.
For example, DEFINE_SPINLOCK creates an unlocked spinlock:
#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
Meanwhile, DECLARE_RWSEM does the exact same thing, but for
the rw_semaphore:
#define DECLARE_RWSEM(name) \
struct rw_semaphore name = __RWSEM_INITIALIZER(name)
--
All Rights Reversed.
Attachment:
signature.asc
Description: This is a digitally signed message part
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
