| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_QSPINLOCK_H |
| #define _ASM_X86_QSPINLOCK_H |
| |
| #include <linux/jump_label.h> |
| #include <asm/cpufeature.h> |
| #include <asm-generic/qspinlock_types.h> |
| #include <asm/paravirt.h> |
| #include <asm/rmwcc.h> |
| #ifdef CONFIG_PARAVIRT |
| #include <asm/paravirt-spinlock.h> |
| #endif |
| |
| #define _Q_PENDING_LOOPS (1 << 9) |
| |
| #define queued_fetch_set_pending_acquire queued_fetch_set_pending_acquire |
| static __always_inline u32 queued_fetch_set_pending_acquire(struct qspinlock *lock) |
| { |
| u32 val; |
| |
| /* |
| * We can't use GEN_BINARY_RMWcc() inside an if() stmt because asm goto |
| * and CONFIG_PROFILE_ALL_BRANCHES=y results in a label inside a |
| * statement expression, which GCC doesn't like. |
| */ |
| val = GEN_BINARY_RMWcc(LOCK_PREFIX "btsl", lock->val.counter, c, |
| "I", _Q_PENDING_OFFSET) * _Q_PENDING_VAL; |
| val |= atomic_read(&lock->val) & ~_Q_PENDING_MASK; |
| |
| return val; |
| } |
| |
| #ifndef CONFIG_PARAVIRT |
| static inline void native_pv_lock_init(void) { } |
| #endif |
| |
| #include <asm-generic/qspinlock.h> |
| |
| #endif /* _ASM_X86_QSPINLOCK_H */ |
