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srcu: Apply trivial callback lists to shrink Tiny SRCU

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The rcu_segcblist structure provides quite a bit of functionality, and
Tiny SRCU needs almost none of it.  So this commit replaces Tiny SRCU's
uses of rcu_segcblist with a simple singly linked list with tail pointer.
This change significantly reduces Tiny SRCU's memory footprint, more
than making up for the growth caused by the creation of rcu_segcblist.c

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2017-05-04 14:29:16 -07:00
parent 5a0465e17a
commit 2464dd940e
4 changed files with 36 additions and 43 deletions
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2
kernel/rcu/rcu.h
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@@ -398,7 +398,7 @@ static inline void srcutorture_get_gp_data(enum rcutorture_type test_type,
if (test_type != SRCU_FLAVOR)
return;
*flags = 0;
*completed = sp->srcu_gp_seq;
*completed = sp->srcu_idx;
*gpnum = *completed;
}