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Diffstat (limited to 'include/linux/workqueue.h')
-rw-r--r--include/linux/workqueue.h35
1 files changed, 22 insertions, 13 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 2b58905d3504..8afab27cdbc2 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -27,7 +27,7 @@ void delayed_work_timer_fn(unsigned long __data);
enum {
WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */
WORK_STRUCT_DELAYED_BIT = 1, /* work item is delayed */
- WORK_STRUCT_CWQ_BIT = 2, /* data points to cwq */
+ WORK_STRUCT_PWQ_BIT = 2, /* data points to pwq */
WORK_STRUCT_LINKED_BIT = 3, /* next work is linked to this one */
#ifdef CONFIG_DEBUG_OBJECTS_WORK
WORK_STRUCT_STATIC_BIT = 4, /* static initializer (debugobjects) */
@@ -40,7 +40,7 @@ enum {
WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT,
WORK_STRUCT_DELAYED = 1 << WORK_STRUCT_DELAYED_BIT,
- WORK_STRUCT_CWQ = 1 << WORK_STRUCT_CWQ_BIT,
+ WORK_STRUCT_PWQ = 1 << WORK_STRUCT_PWQ_BIT,
WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT,
#ifdef CONFIG_DEBUG_OBJECTS_WORK
WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT,
@@ -57,29 +57,36 @@ enum {
/* special cpu IDs */
WORK_CPU_UNBOUND = NR_CPUS,
- WORK_CPU_NONE = NR_CPUS + 1,
- WORK_CPU_LAST = WORK_CPU_NONE,
+ WORK_CPU_END = NR_CPUS + 1,
/*
- * Reserve 7 bits off of cwq pointer w/ debugobjects turned
- * off. This makes cwqs aligned to 256 bytes and allows 15
- * workqueue flush colors.
+ * Reserve 7 bits off of pwq pointer w/ debugobjects turned off.
+ * This makes pwqs aligned to 256 bytes and allows 15 workqueue
+ * flush colors.
*/
WORK_STRUCT_FLAG_BITS = WORK_STRUCT_COLOR_SHIFT +
WORK_STRUCT_COLOR_BITS,
- /* data contains off-queue information when !WORK_STRUCT_CWQ */
+ /* data contains off-queue information when !WORK_STRUCT_PWQ */
WORK_OFFQ_FLAG_BASE = WORK_STRUCT_FLAG_BITS,
WORK_OFFQ_CANCELING = (1 << WORK_OFFQ_FLAG_BASE),
+ /*
+ * When a work item is off queue, its high bits point to the last
+ * pool it was on. Cap at 31 bits and use the highest number to
+ * indicate that no pool is associated.
+ */
WORK_OFFQ_FLAG_BITS = 1,
- WORK_OFFQ_CPU_SHIFT = WORK_OFFQ_FLAG_BASE + WORK_OFFQ_FLAG_BITS,
+ WORK_OFFQ_POOL_SHIFT = WORK_OFFQ_FLAG_BASE + WORK_OFFQ_FLAG_BITS,
+ WORK_OFFQ_LEFT = BITS_PER_LONG - WORK_OFFQ_POOL_SHIFT,
+ WORK_OFFQ_POOL_BITS = WORK_OFFQ_LEFT <= 31 ? WORK_OFFQ_LEFT : 31,
+ WORK_OFFQ_POOL_NONE = (1LU << WORK_OFFQ_POOL_BITS) - 1,
/* convenience constants */
WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1,
WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK,
- WORK_STRUCT_NO_CPU = (unsigned long)WORK_CPU_NONE << WORK_OFFQ_CPU_SHIFT,
+ WORK_STRUCT_NO_POOL = (unsigned long)WORK_OFFQ_POOL_NONE << WORK_OFFQ_POOL_SHIFT,
/* bit mask for work_busy() return values */
WORK_BUSY_PENDING = 1 << 0,
@@ -95,13 +102,16 @@ struct work_struct {
#endif
};
-#define WORK_DATA_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU)
+#define WORK_DATA_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_NO_POOL)
#define WORK_DATA_STATIC_INIT() \
- ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU | WORK_STRUCT_STATIC)
+ ATOMIC_LONG_INIT(WORK_STRUCT_NO_POOL | WORK_STRUCT_STATIC)
struct delayed_work {
struct work_struct work;
struct timer_list timer;
+
+ /* target workqueue and CPU ->timer uses to queue ->work */
+ struct workqueue_struct *wq;
int cpu;
};
@@ -426,7 +436,6 @@ extern bool cancel_delayed_work_sync(struct delayed_work *dwork);
extern void workqueue_set_max_active(struct workqueue_struct *wq,
int max_active);
extern bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq);
-extern unsigned int work_cpu(struct work_struct *work);
extern unsigned int work_busy(struct work_struct *work);
/*