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...efine _QCODE_OFFSET 8 +#if CONFIG_NR_CPUS >= (1 << 14) +# define _Q_MANY_CPUS +# define _QCODE_OFFSET 8 +#else +# define _QCODE_OFFSET 16 +#endif + #define _QSPINLOCK_LOCKED 1U #define _QSPINLOCK_LOCK_MASK 0xff diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index ed5efa7..22a63fa 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -109,8 +109,11 @@ static DEFINE_PER_CPU_ALIGNED(struct qnode_set, qnset) = { {{0}}, 0 }; * 2) A smp_u8_store_release() macro for byte size store operation * * 3) A "union arch_qspinlock" structure t...

...efine _QCODE_OFFSET 8 +#if CONFIG_NR_CPUS >= (1 << 14) +# define _Q_MANY_CPUS +# define _QCODE_OFFSET 8 +#else +# define _QCODE_OFFSET 16 +#endif + #define _QSPINLOCK_LOCKED 1U #define _QSPINLOCK_LOCK_MASK 0xff diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index ed5efa7..22a63fa 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -109,8 +109,11 @@ static DEFINE_PER_CPU_ALIGNED(struct qnode_set, qnset) = { {{0}}, 0 }; * 2) A smp_u8_store_release() macro for byte size store operation * * 3) A "union arch_qspinlock" structure t...

...inlock.o +obj-$(CONFIG_QUEUE_SPINLOCK) += qspinlock.o obj-$(CONFIG_RT_MUTEXES) += rtmutex.o obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c new file mode 100644 index 0000000..ed5efa7 --- /dev/null +++ b/kernel/locking/qspinlock.c @@ -0,0 +1,393 @@ +/* + * Queue spinlock + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the Lic...

...inlock.o +obj-$(CONFIG_QUEUE_SPINLOCK) += qspinlock.o obj-$(CONFIG_RT_MUTEXES) += rtmutex.o obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c new file mode 100644 index 0000000..ed5efa7 --- /dev/null +++ b/kernel/locking/qspinlock.c @@ -0,0 +1,393 @@ +/* + * Queue spinlock + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the Lic...

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue