diff options
Diffstat (limited to '')
-rw-r--r-- | Documentation/locking/locktypes.rst | 5 | ||||
-rw-r--r-- | Documentation/locking/seqlock.rst | 2 |
2 files changed, 2 insertions, 5 deletions
diff --git a/Documentation/locking/locktypes.rst b/Documentation/locking/locktypes.rst index 4fd7b70fcde1..9933faad4771 100644 --- a/Documentation/locking/locktypes.rst +++ b/Documentation/locking/locktypes.rst @@ -211,9 +211,6 @@ raw_spinlock_t and spinlock_t raw_spinlock_t -------------- -raw_spinlock_t is a strict spinning lock implementation regardless of the -kernel configuration including PREEMPT_RT enabled kernels. - raw_spinlock_t is a strict spinning lock implementation in all kernels, including PREEMPT_RT kernels. Use raw_spinlock_t only in real critical core code, low-level interrupt handling and places where disabling @@ -247,7 +244,7 @@ based on rt_mutex which changes the semantics: Non-PREEMPT_RT kernels disable preemption to get this effect. PREEMPT_RT kernels use a per-CPU lock for serialization which keeps - preemption disabled. The lock disables softirq handlers and also + preemption enabled. The lock disables softirq handlers and also prevents reentrancy due to task preemption. PREEMPT_RT kernels preserve all other spinlock_t semantics: diff --git a/Documentation/locking/seqlock.rst b/Documentation/locking/seqlock.rst index 64405e5da63e..bfda1a5fecad 100644 --- a/Documentation/locking/seqlock.rst +++ b/Documentation/locking/seqlock.rst @@ -39,7 +39,7 @@ as the writer can invalidate a pointer that the reader is following. Sequence counters (``seqcount_t``) ================================== -This is the the raw counting mechanism, which does not protect against +This is the raw counting mechanism, which does not protect against multiple writers. Write side critical sections must thus be serialized by an external lock. |