search for: fcf06cb

Displaying 4 results from an estimated 4 matches for "fcf06cb".

[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
..._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 previous...
[PATCH v9 05/19] qspinlock: Optimize for smaller NR_CPUS
2014 Apr 17
0
[PATCH v9 05/19] qspinlock: Optimize for smaller NR_CPUS
..._CPU_OFFSET) #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_OFFSET _Q_TAIL_IDX_OFFSET #define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index fcf06cb..55601b4 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -22,8 +22,13 @@ #include <linux/percpu.h> #include <linux/hardirq.h> #include <linux/mutex.h> +#include <asm/byteorder.h> #include <asm/qspinlock.h> +#if !defined(__LITTLE_ENDIAN...
[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