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posix-cpu-timers: Split out posix-timers_types.h

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Trimming down sched.h dependencies: we don't want to include more than
the base types.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2023-12-11 12:43:30 -05:00
parent d84f317915
commit 53d31ba842
3 changed files with 84 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/posix-timers.h
+3 -66
View File
@@ -2,40 +2,16 @@
#ifndef _linux_POSIX_TIMERS_H
#define _linux_POSIX_TIMERS_H
#include <linux/spinlock.h>
#include <linux/alarmtimer.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/alarmtimer.h>
#include <linux/posix-timers_types.h>
#include <linux/spinlock.h>
#include <linux/timerqueue.h>
struct kernel_siginfo;
struct task_struct;
/*
* Bit fields within a clockid:
*
* The most significant 29 bits hold either a pid or a file descriptor.
*
* Bit 2 indicates whether a cpu clock refers to a thread or a process.
*
* Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3.
*
* A clockid is invalid if bits 2, 1, and 0 are all set.
*/
#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
#define CPUCLOCK_PERTHREAD(clock) \
(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
#define CPUCLOCK_PERTHREAD_MASK 4
#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
#define CPUCLOCK_CLOCK_MASK 3
#define CPUCLOCK_PROF 0
#define CPUCLOCK_VIRT 1
#define CPUCLOCK_SCHED 2
#define CPUCLOCK_MAX 3
#define CLOCKFD CPUCLOCK_MAX
#define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK)
static inline clockid_t make_process_cpuclock(const unsigned int pid,
const clockid_t clock)
{
@@ -109,44 +85,6 @@ static inline void cpu_timer_setexpires(struct cpu_timer *ctmr, u64 exp)
ctmr->node.expires = exp;
}
/**
* posix_cputimer_base - Container per posix CPU clock
* @nextevt: Earliest-expiration cache
* @tqhead: timerqueue head for cpu_timers
*/
struct posix_cputimer_base {
u64 nextevt;
struct timerqueue_head tqhead;
};
/**
* posix_cputimers - Container for posix CPU timer related data
* @bases: Base container for posix CPU clocks
* @timers_active: Timers are queued.
* @expiry_active: Timer expiry is active. Used for
* process wide timers to avoid multiple
* task trying to handle expiry concurrently
*
* Used in task_struct and signal_struct
*/
struct posix_cputimers {
struct posix_cputimer_base bases[CPUCLOCK_MAX];
unsigned int timers_active;
unsigned int expiry_active;
};
/**
* posix_cputimers_work - Container for task work based posix CPU timer expiry
* @work: The task work to be scheduled
* @mutex: Mutex held around expiry in context of this task work
* @scheduled: @work has been scheduled already, no further processing
*/
struct posix_cputimers_work {
struct callback_head work;
struct mutex mutex;
unsigned int scheduled;
};
static inline void posix_cputimers_init(struct posix_cputimers *pct)
{
memset(pct, 0, sizeof(*pct));
@@ -179,7 +117,6 @@ static inline void posix_cputimers_rt_watchdog(struct posix_cputimers *pct,
.bases = INIT_CPU_TIMERBASES(s.posix_cputimers.bases), \
},
#else
struct posix_cputimers { };
struct cpu_timer { };
#define INIT_CPU_TIMERS(s)
static inline void posix_cputimers_init(struct posix_cputimers *pct) { }
include/linux/posix-timers_types.h
+80
View File
@@ -0,0 +1,80 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _linux_POSIX_TIMERS_TYPES_H
#define _linux_POSIX_TIMERS_TYPES_H
#include <linux/mutex_types.h>
#include <linux/timerqueue.h>
#include <linux/types.h>
/*
* Bit fields within a clockid:
*
* The most significant 29 bits hold either a pid or a file descriptor.
*
* Bit 2 indicates whether a cpu clock refers to a thread or a process.
*
* Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3.
*
* A clockid is invalid if bits 2, 1, and 0 are all set.
*/
#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
#define CPUCLOCK_PERTHREAD(clock) \
(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
#define CPUCLOCK_PERTHREAD_MASK 4
#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
#define CPUCLOCK_CLOCK_MASK 3
#define CPUCLOCK_PROF 0
#define CPUCLOCK_VIRT 1
#define CPUCLOCK_SCHED 2
#define CPUCLOCK_MAX 3
#define CLOCKFD CPUCLOCK_MAX
#define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK)
#ifdef CONFIG_POSIX_TIMERS
/**
* posix_cputimer_base - Container per posix CPU clock
* @nextevt: Earliest-expiration cache
* @tqhead: timerqueue head for cpu_timers
*/
struct posix_cputimer_base {
u64 nextevt;
struct timerqueue_head tqhead;
};
/**
* posix_cputimers - Container for posix CPU timer related data
* @bases: Base container for posix CPU clocks
* @timers_active: Timers are queued.
* @expiry_active: Timer expiry is active. Used for
* process wide timers to avoid multiple
* task trying to handle expiry concurrently
*
* Used in task_struct and signal_struct
*/
struct posix_cputimers {
struct posix_cputimer_base bases[CPUCLOCK_MAX];
unsigned int timers_active;
unsigned int expiry_active;
};
/**
* posix_cputimers_work - Container for task work based posix CPU timer expiry
* @work: The task work to be scheduled
* @mutex: Mutex held around expiry in context of this task work
* @scheduled: @work has been scheduled already, no further processing
*/
struct posix_cputimers_work {
struct callback_head work;
struct mutex mutex;
unsigned int scheduled;
};
#else /* CONFIG_POSIX_TIMERS */
struct posix_cputimers { };
#endif /* CONFIG_POSIX_TIMERS */
#endif /* _linux_POSIX_TIMERS_TYPES_H */
include/linux/sched.h
+1 -1
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@@ -31,7 +31,7 @@
#include <linux/syscall_user_dispatch.h>
#include <linux/mm_types_task.h>
#include <linux/task_io_accounting.h>
#include <linux/posix-timers.h>
#include <linux/posix-timers_types.h>
#include <linux/rseq.h>
#include <linux/seqlock.h>
#include <linux/kcsan.h>