search for: d35362a

Displaying 4 results from an estimated 4 matches for "d35362a".

[PATCH v9 04/19] qspinlock: Extract out the exchange of tail code word
2014 Apr 17
0
[PATCH v9 04/19] qspinlock: Extract out the exchange of tail code word
...define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) + #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index d35362a..fcf06cb 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -86,6 +86,34 @@ static inline struct mcs_spinlock *decode_tail(u32 tail) #define _Q_LOCKED_PENDING_MASK (_Q_LOCKED_MASK | _Q_PENDING_MASK) /** + * xchg_tail - Put in the new queue tail code word & retrieve...
[PATCH v9 03/19] qspinlock: Add pending bit
2014 Apr 17
0
[PATCH v9 03/19] qspinlock: Add pending bit
...ock { #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) +#define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) #endif /* __ASM_GENERIC_QSPINLOCK_TYPES_H */ diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index b97a1ad..d35362a 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -83,23 +83,93 @@ static inline struct mcs_spinlock *decode_tail(u32 tail) return per_cpu_ptr(&mcs_nodes[idx], cpu); } +#define _Q_LOCKED_PENDING_MASK (_Q_LOCKED_MASK | _Q_PENDING_MASK) + +/** + * trylock_pending -...
[PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support
2014 Apr 17
33
[PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support
v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex patches into smaller ones to ease review effort. - Fix a racing condition in the PV qspinlock code. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving
[PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support
2014 Apr 17
33
[PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support
v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex patches into smaller ones to ease review effort. - Fix a racing condition in the PV qspinlock code. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving