linux-toradex.git - Linux kernel for Apalis, Colibri and Verdin modules

Age	Commit message (Collapse)	Author
2011-11-11	hwspinlock/core: use a mutex to protect the radix tree	Juan Gutierrez
	commit 93b465c2e186d96fb90012ba0f9372eb9952e732 upstream. Since we're using non-atomic radix tree allocations, we should be protecting the tree using a mutex and not a spinlock. Non-atomic allocations and process context locking is good enough, as the tree is manipulated only when locks are registered/ unregistered/requested/freed. The locks themselves are still protected by spinlocks of course, and mutexes are not involved in the locking/unlocking paths. Signed-off-by: Juan Gutierrez <jgutierrez@ti.com> [ohad@wizery.com: rewrite the commit log, #include mutex.h, add minor commentary] [ohad@wizery.com: update register/unregister parts in hwspinlock.txt] Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-17	drivers: hwspinlock: add framework	Ohad Ben-Cohen
	Add a platform-independent hwspinlock framework. Hardware spinlock devices are needed, e.g., in order to access data that is shared between remote processors, that otherwise have no alternative mechanism to accomplish synchronization and mutual exclusion operations. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Cc: Hari Kanigeri <h-kanigeri2@ti.com> Cc: Benoit Cousson <b-cousson@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Paul Walmsley <paul@pwsan.com> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Tony Lindgren <tony@atomide.com>