/* SPDX-License-Identifier: GPL-2.0 */
|
#ifndef _ASM_X86_SPINLOCK_H
|
#define _ASM_X86_SPINLOCK_H
|
|
#include <linux/jump_label.h>
|
#include <linux/atomic.h>
|
#include <asm/page.h>
|
#include <asm/processor.h>
|
#include <linux/compiler.h>
|
#include <asm/paravirt.h>
|
#include <asm/bitops.h>
|
|
/*
|
* Your basic SMP spinlocks, allowing only a single CPU anywhere
|
*
|
* Simple spin lock operations. There are two variants, one clears IRQ's
|
* on the local processor, one does not.
|
*
|
* These are fair FIFO ticket locks, which support up to 2^16 CPUs.
|
*
|
* (the type definitions are in asm/spinlock_types.h)
|
*/
|
|
/* How long a lock should spin before we consider blocking */
|
#define SPIN_THRESHOLD (1 << 15)
|
|
#include <asm/qspinlock.h>
|
|
/*
|
* Read-write spinlocks, allowing multiple readers
|
* but only one writer.
|
*
|
* NOTE! it is quite common to have readers in interrupts
|
* but no interrupt writers. For those circumstances we
|
* can "mix" irq-safe locks - any writer needs to get a
|
* irq-safe write-lock, but readers can get non-irqsafe
|
* read-locks.
|
*
|
* On x86, we implement read-write locks using the generic qrwlock with
|
* x86 specific optimization.
|
*/
|
|
#include <asm/qrwlock.h>
|
|
#endif /* _ASM_X86_SPINLOCK_H */
|
