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rcu: Handle obsolete references to TINY_PREEMPT_RCU 

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
This commit is contained in:
Paul E. McKenney 2014-05-04 15:41:21 -07:00
parent f27bc4873f
commit ab74fdfd4e
2 changed files with 9 additions and 10 deletions
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17
include/linux/rcupdate.h
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@ -826,15 +826,14 @@ static inline void rcu_preempt_sleep_check(void)
* read-side critical section that would block in a !PREEMPT kernel.
* But if you want the full story, read on!
*
* In non-preemptible RCU implementations (TREE_RCU and TINY_RCU), it
* is illegal to block while in an RCU read-side critical section. In
* preemptible RCU implementations (TREE_PREEMPT_RCU and TINY_PREEMPT_RCU)
* in CONFIG_PREEMPT kernel builds, RCU read-side critical sections may
* be preempted, but explicit blocking is illegal. Finally, in preemptible
* RCU implementations in real-time (with -rt patchset) kernel builds,
* RCU read-side critical sections may be preempted and they may also
* block, but only when acquiring spinlocks that are subject to priority
* inheritance.
* In non-preemptible RCU implementations (TREE_RCU and TINY_RCU),
* it is illegal to block while in an RCU read-side critical section.
* In preemptible RCU implementations (TREE_PREEMPT_RCU) in CONFIG_PREEMPT
* kernel builds, RCU read-side critical sections may be preempted,
* but explicit blocking is illegal. Finally, in preemptible RCU
* implementations in real-time (with -rt patchset) kernel builds, RCU
* read-side critical sections may be preempted and they may also block, but
* only when acquiring spinlocks that are subject to priority inheritance.
*/
static inline void rcu_read_lock(void)
{

2
init/Kconfig
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@ -505,7 +505,7 @@ config PREEMPT_RCU
def_bool TREE_PREEMPT_RCU
help
This option enables preemptible-RCU code that is common between
the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
TREE_PREEMPT_RCU and, in the old days, TINY_PREEMPT_RCU.
config RCU_STALL_COMMON
def_bool ( TREE_RCU || TREE_PREEMPT_RCU || RCU_TRACE )