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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-04-12 22:34:41 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-08-14 00:34:50 +0300 |
| commit | 1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c (patch) | |
| tree | e9fbae8771f5b45cc11b299883c3d477902642f1 /kernel/rcu/rcu_segcblist.c | |
| parent | 18cd8c93e69e3853eb408980089fb3c58813f922 (diff) | |
| download | linux-1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c.tar.xz | |
rcu/nocb: Use separate flag to indicate disabled ->cblist
NULLing the RCU_NEXT_TAIL pointer was a clever way to save a byte, but
forward-progress considerations would require that this pointer be both
NULL and non-NULL, which, absent a quantum-computer port of the Linux
kernel, simply won't happen. This commit therefore creates as separate
->enabled flag to replace the current NULL checks.
[ paulmck: Add include files per 0day test robot and -next. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu/rcu_segcblist.c')
| -rw-r--r-- | kernel/rcu/rcu_segcblist.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/rcu_segcblist.c b/kernel/rcu/rcu_segcblist.c index 9bd5f6023c21..b305dcac34c9 100644 --- a/kernel/rcu/rcu_segcblist.c +++ b/kernel/rcu/rcu_segcblist.c @@ -58,6 +58,7 @@ void rcu_segcblist_init(struct rcu_segcblist *rsclp) rsclp->tails[i] = &rsclp->head; rsclp->len = 0; rsclp->len_lazy = 0; + rsclp->enabled = 1; } /* @@ -69,7 +70,7 @@ void rcu_segcblist_disable(struct rcu_segcblist *rsclp) WARN_ON_ONCE(!rcu_segcblist_empty(rsclp)); WARN_ON_ONCE(rcu_segcblist_n_cbs(rsclp)); WARN_ON_ONCE(rcu_segcblist_n_lazy_cbs(rsclp)); - rsclp->tails[RCU_NEXT_TAIL] = NULL; + rsclp->enabled = 0; } /* |