| Server IP : 172.67.216.182 / Your IP : 172.69.176.31 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/src/linux-headers-5.15.0-143-generic/arch/powerpc/include/asm/ |
Upload File : |
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_QSPINLOCK_H
#define _ASM_POWERPC_QSPINLOCK_H
#include <asm-generic/qspinlock_types.h>
#include <asm/paravirt.h>
#define _Q_PENDING_LOOPS (1 << 9) /* not tuned */
#ifdef CONFIG_PARAVIRT_SPINLOCKS
extern void native_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val);
extern void __pv_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val);
extern void __pv_queued_spin_unlock(struct qspinlock *lock);
static __always_inline void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val)
{
if (!is_shared_processor())
native_queued_spin_lock_slowpath(lock, val);
else
__pv_queued_spin_lock_slowpath(lock, val);
}
#define queued_spin_unlock queued_spin_unlock
static inline void queued_spin_unlock(struct qspinlock *lock)
{
if (!is_shared_processor())
smp_store_release(&lock->locked, 0);
else
__pv_queued_spin_unlock(lock);
}
#else
extern void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val);
#endif
static __always_inline void queued_spin_lock(struct qspinlock *lock)
{
u32 val = 0;
if (likely(arch_atomic_try_cmpxchg_lock(&lock->val, &val, _Q_LOCKED_VAL)))
return;
queued_spin_lock_slowpath(lock, val);
}
#define queued_spin_lock queued_spin_lock
#ifdef CONFIG_PARAVIRT_SPINLOCKS
#define SPIN_THRESHOLD (1<<15) /* not tuned */
static __always_inline void pv_wait(u8 *ptr, u8 val)
{
if (*ptr != val)
return;
yield_to_any();
/*
* We could pass in a CPU here if waiting in the queue and yield to
* the previous CPU in the queue.
*/
}
static __always_inline void pv_kick(int cpu)
{
prod_cpu(cpu);
}
extern void __pv_init_lock_hash(void);
static inline void pv_spinlocks_init(void)
{
__pv_init_lock_hash();
}
#endif
/*
* Queued spinlocks rely heavily on smp_cond_load_relaxed() to busy-wait,
* which was found to have performance problems if implemented with
* the preferred spin_begin()/spin_end() SMT priority pattern. Use the
* generic version instead.
*/
#include <asm-generic/qspinlock.h>
#endif /* _ASM_POWERPC_QSPINLOCK_H */