synchronize_srcu — wait for prior SRCU read-side critical-section completion
void synchronize_srcu ( | struct srcu_struct * sp) ; |
Wait for the count to drain to zero of both indexes. To avoid the
possible starvation of synchronize_srcu
, it waits for the count of
the index=((->completed & 1) ^ 1) to drain to zero at first,
and then flip the completed and wait for the count of the other index.
Can block; must be called from process context.
Note that it is illegal to call synchronize_srcu
from the corresponding
SRCU read-side critical section; doing so will result in deadlock.
However, it is perfectly legal to call synchronize_srcu
on one
srcu_struct from some other srcu_struct's read-side critical section.