in linux/spinlock.h the spinlocks are defined
and i want to know what kind of a reasonability does it have to define
spin_lock and spin_unlock in the following way.
#define spin_lock(lock) do {} while(0)
#define spin_unlock(lock) (void)...
to be shorty, what is the actual aim of spin_lock and spin_unlock ,
spin_lock_irq spin_unlock_irq.....etc
and what is the aim of semaphores.
i have read a documentation that basically describes them but not in more
detail so that i counld not get it well enough.
sincerely.
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
