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- /* 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 */
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