4 Commits

Author	SHA1	Message	Date
Oleg Nesterov	95b19f684c	locking/percpu-rwsem: Make percpu_free_rwsem() after kzalloc() safe ... This is the temporary ugly hack which will be reverted later. We only need it to ensure that the next patch will not break "change sb_writers to use percpu_rw_semaphore" patches routed via the VFS tree. The alloc_super()->destroy_super() error path assumes that it is safe to call percpu_free_rwsem() after kzalloc() without percpu_init_rwsem(), so let's not disappoint it. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>	2015-10-06 11:25:26 -07:00
Paul E. McKenney	302707fd7c	locking/percpu-rwsem: Export symbols for locktorture ... This commit exports percpu_down_read(), percpu_down_write(), __percpu_init_rwsem(), percpu_up_read(), and percpu_up_write() to allow locktorture to test them when built as a module. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>	2015-10-06 11:24:51 -07:00
Oleg Nesterov	9287f6925a	percpu-rwsem: introduce percpu_down_read_trylock() ... Add percpu_down_read_trylock(), it will have the user soon. Signed-off-by: Oleg Nesterov <oleg@redhat.com>	2015-08-15 13:52:10 +02:00
Peter Zijlstra	32cf7c3c94	locking: Move the percpu-rwsem code to kernel/locking/ ... Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-52bjmtty46we26hbfd9sc9iy@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>	2013-11-06 09:24:22 +01:00