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| author |   Paul E. McKenney <paulmck@linux.ibm.com> | 2019-04-12 12:34:41 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-08-13 14:34:50 -0700 |
| commit | 1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c (patch) | |
| tree | e9fbae8771f5b45cc11b299883c3d477902642f1 /include/linux/rcu_segcblist.h | |
| parent | rcu/nocb: Print gp/cb kthread hierarchy if dump_tree (diff) | |
| download | linux-dev-1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c.tar.xz linux-dev-1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c.zip | |
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 'include/linux/rcu_segcblist.h')
| -rw-r--r-- | include/linux/rcu_segcblist.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/rcu_segcblist.h b/include/linux/rcu_segcblist.h index 87404cb015f1..ed2cfd3c0743 100644 --- a/include/linux/rcu_segcblist.h +++ b/include/linux/rcu_segcblist.h @@ -14,6 +14,9 @@ #ifndef __INCLUDE_LINUX_RCU_SEGCBLIST_H #define __INCLUDE_LINUX_RCU_SEGCBLIST_H +#include <linux/types.h> +#include <linux/atomic.h> + /* Simple unsegmented callback lists. */ struct rcu_cblist { struct rcu_head *head; @@ -67,6 +70,7 @@ struct rcu_segcblist { unsigned long gp_seq[RCU_CBLIST_NSEGS]; long len; long len_lazy; + u8 enabled; }; #define RCU_SEGCBLIST_INITIALIZER(n) \ |