/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_SMP_TYPES_H #define __LINUX_SMP_TYPES_H #include <linux/llist.h> enum { CSD_FLAG_LOCK = 0x01, IRQ_WORK_PENDING = 0x01, IRQ_WORK_BUSY = 0x02, IRQ_WORK_LAZY = 0x04, /* No IPI, wait for tick */ IRQ_WORK_HARD_IRQ = 0x08, /* IRQ context on PREEMPT_RT */ IRQ_WORK_CLAIMED = (IRQ_WORK_PENDING | IRQ_WORK_BUSY), CSD_TYPE_ASYNC = 0x00, CSD_TYPE_SYNC = 0x10, CSD_TYPE_IRQ_WORK = 0x20, CSD_TYPE_TTWU = 0x30, CSD_FLAG_TYPE_MASK = 0xF0, }; /* * struct __call_single_node is the primary type on * smp.c:call_single_queue. * * flush_smp_call_function_queue() only reads the type from * __call_single_node::u_flags as a regular load, the above * (anonymous) enum defines all the bits of this word. * * Other bits are not modified until the type is known. * * CSD_TYPE_SYNC/ASYNC: * struct { * struct llist_node node; * unsigned int flags; * smp_call_func_t func; * void *info; * }; * * CSD_TYPE_IRQ_WORK: * struct { * struct llist_node node; * atomic_t flags; * void (*func)(struct irq_work *); * }; * * CSD_TYPE_TTWU: * struct { * struct llist_node node; * unsigned int flags; * }; * */ struct __call_single_node { struct llist_node llist; union { unsigned int u_flags; atomic_t a_flags; }; #ifdef CONFIG_64BIT u16 src, dst; #endif }; #endif /* __LINUX_SMP_TYPES_H */