diff options
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 2380d1e3dfb8..844a030c1960 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3409,41 +3409,6 @@ void cond_synchronize_sched(unsigned long oldstate) } EXPORT_SYMBOL_GPL(cond_synchronize_sched); -/* Adjust sequence number for start of update-side operation. */ -static void rcu_seq_start(unsigned long *sp) -{ - WRITE_ONCE(*sp, *sp + 1); - smp_mb(); /* Ensure update-side operation after counter increment. */ - WARN_ON_ONCE(!(*sp & 0x1)); -} - -/* Adjust sequence number for end of update-side operation. */ -static void rcu_seq_end(unsigned long *sp) -{ - smp_mb(); /* Ensure update-side operation before counter increment. */ - WRITE_ONCE(*sp, *sp + 1); - WARN_ON_ONCE(*sp & 0x1); -} - -/* Take a snapshot of the update side's sequence number. */ -static unsigned long rcu_seq_snap(unsigned long *sp) -{ - unsigned long s; - - s = (READ_ONCE(*sp) + 3) & ~0x1; - smp_mb(); /* Above access must not bleed into critical section. */ - return s; -} - -/* - * Given a snapshot from rcu_seq_snap(), determine whether or not a - * full update-side operation has occurred. - */ -static bool rcu_seq_done(unsigned long *sp, unsigned long s) -{ - return ULONG_CMP_GE(READ_ONCE(*sp), s); -} - /* * Check to see if there is any immediate RCU-related work to be done * by the current CPU, for the specified type of RCU, returning 1 if so. |