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Diffstat (limited to 'kernel/posix-cpu-timers.c')
-rw-r--r--kernel/posix-cpu-timers.c78
1 files changed, 38 insertions, 40 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 84af54c39e1..520f6c59948 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -7,7 +7,7 @@
#include <asm/uaccess.h>
#include <linux/errno.h>
-static int check_clock(clockid_t which_clock)
+static int check_clock(const clockid_t which_clock)
{
int error = 0;
struct task_struct *p;
@@ -31,19 +31,19 @@ static int check_clock(clockid_t which_clock)
}
static inline union cpu_time_count
-timespec_to_sample(clockid_t which_clock, const struct timespec *tp)
+timespec_to_sample(const clockid_t which_clock, const struct timespec *tp)
{
union cpu_time_count ret;
ret.sched = 0; /* high half always zero when .cpu used */
if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) {
- ret.sched = tp->tv_sec * NSEC_PER_SEC + tp->tv_nsec;
+ ret.sched = (unsigned long long)tp->tv_sec * NSEC_PER_SEC + tp->tv_nsec;
} else {
ret.cpu = timespec_to_cputime(tp);
}
return ret;
}
-static void sample_to_timespec(clockid_t which_clock,
+static void sample_to_timespec(const clockid_t which_clock,
union cpu_time_count cpu,
struct timespec *tp)
{
@@ -55,7 +55,7 @@ static void sample_to_timespec(clockid_t which_clock,
}
}
-static inline int cpu_time_before(clockid_t which_clock,
+static inline int cpu_time_before(const clockid_t which_clock,
union cpu_time_count now,
union cpu_time_count then)
{
@@ -65,7 +65,7 @@ static inline int cpu_time_before(clockid_t which_clock,
return cputime_lt(now.cpu, then.cpu);
}
}
-static inline void cpu_time_add(clockid_t which_clock,
+static inline void cpu_time_add(const clockid_t which_clock,
union cpu_time_count *acc,
union cpu_time_count val)
{
@@ -75,7 +75,7 @@ static inline void cpu_time_add(clockid_t which_clock,
acc->cpu = cputime_add(acc->cpu, val.cpu);
}
}
-static inline union cpu_time_count cpu_time_sub(clockid_t which_clock,
+static inline union cpu_time_count cpu_time_sub(const clockid_t which_clock,
union cpu_time_count a,
union cpu_time_count b)
{
@@ -151,7 +151,7 @@ static inline unsigned long long sched_ns(struct task_struct *p)
return (p == current) ? current_sched_time(p) : p->sched_time;
}
-int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *tp)
+int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp)
{
int error = check_clock(which_clock);
if (!error) {
@@ -169,7 +169,7 @@ int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *tp)
return error;
}
-int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp)
+int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp)
{
/*
* You can never reset a CPU clock, but we check for other errors
@@ -186,7 +186,7 @@ int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp)
/*
* Sample a per-thread clock for the given task.
*/
-static int cpu_clock_sample(clockid_t which_clock, struct task_struct *p,
+static int cpu_clock_sample(const clockid_t which_clock, struct task_struct *p,
union cpu_time_count *cpu)
{
switch (CPUCLOCK_WHICH(which_clock)) {
@@ -238,18 +238,7 @@ static int cpu_clock_sample_group_locked(unsigned int clock_idx,
while ((t = next_thread(t)) != p) {
cpu->sched += t->sched_time;
}
- if (p->tgid == current->tgid) {
- /*
- * We're sampling ourselves, so include the
- * cycles not yet banked. We still omit
- * other threads running on other CPUs,
- * so the total can always be behind as
- * much as max(nthreads-1,ncpus) * (NSEC_PER_SEC/HZ).
- */
- cpu->sched += current_sched_time(current);
- } else {
- cpu->sched += p->sched_time;
- }
+ cpu->sched += sched_ns(p);
break;
}
return 0;
@@ -259,7 +248,7 @@ static int cpu_clock_sample_group_locked(unsigned int clock_idx,
* Sample a process (thread group) clock for the given group_leader task.
* Must be called with tasklist_lock held for reading.
*/
-static int cpu_clock_sample_group(clockid_t which_clock,
+static int cpu_clock_sample_group(const clockid_t which_clock,
struct task_struct *p,
union cpu_time_count *cpu)
{
@@ -273,7 +262,7 @@ static int cpu_clock_sample_group(clockid_t which_clock,
}
-int posix_cpu_clock_get(clockid_t which_clock, struct timespec *tp)
+int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp)
{
const pid_t pid = CPUCLOCK_PID(which_clock);
int error = -EINVAL;
@@ -1410,8 +1399,8 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx,
static long posix_cpu_clock_nanosleep_restart(struct restart_block *);
-int posix_cpu_nsleep(clockid_t which_clock, int flags,
- struct timespec *rqtp)
+int posix_cpu_nsleep(const clockid_t which_clock, int flags,
+ struct timespec *rqtp, struct timespec __user *rmtp)
{
struct restart_block *restart_block =
&current_thread_info()->restart_block;
@@ -1436,7 +1425,6 @@ int posix_cpu_nsleep(clockid_t which_clock, int flags,
error = posix_cpu_timer_create(&timer);
timer.it_process = current;
if (!error) {
- struct timespec __user *rmtp;
static struct itimerspec zero_it;
struct itimerspec it = { .it_value = *rqtp,
.it_interval = {} };
@@ -1483,7 +1471,6 @@ int posix_cpu_nsleep(clockid_t which_clock, int flags,
/*
* Report back to the user the time still remaining.
*/
- rmtp = (struct timespec __user *) restart_block->arg1;
if (rmtp != NULL && !(flags & TIMER_ABSTIME) &&
copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
return -EFAULT;
@@ -1491,6 +1478,7 @@ int posix_cpu_nsleep(clockid_t which_clock, int flags,
restart_block->fn = posix_cpu_clock_nanosleep_restart;
/* Caller already set restart_block->arg1 */
restart_block->arg0 = which_clock;
+ restart_block->arg1 = (unsigned long) rmtp;
restart_block->arg2 = rqtp->tv_sec;
restart_block->arg3 = rqtp->tv_nsec;
@@ -1504,21 +1492,28 @@ static long
posix_cpu_clock_nanosleep_restart(struct restart_block *restart_block)
{
clockid_t which_clock = restart_block->arg0;
- struct timespec t = { .tv_sec = restart_block->arg2,
- .tv_nsec = restart_block->arg3 };
+ struct timespec __user *rmtp;
+ struct timespec t;
+
+ rmtp = (struct timespec __user *) restart_block->arg1;
+ t.tv_sec = restart_block->arg2;
+ t.tv_nsec = restart_block->arg3;
+
restart_block->fn = do_no_restart_syscall;
- return posix_cpu_nsleep(which_clock, TIMER_ABSTIME, &t);
+ return posix_cpu_nsleep(which_clock, TIMER_ABSTIME, &t, rmtp);
}
#define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED)
#define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED)
-static int process_cpu_clock_getres(clockid_t which_clock, struct timespec *tp)
+static int process_cpu_clock_getres(const clockid_t which_clock,
+ struct timespec *tp)
{
return posix_cpu_clock_getres(PROCESS_CLOCK, tp);
}
-static int process_cpu_clock_get(clockid_t which_clock, struct timespec *tp)
+static int process_cpu_clock_get(const clockid_t which_clock,
+ struct timespec *tp)
{
return posix_cpu_clock_get(PROCESS_CLOCK, tp);
}
@@ -1527,16 +1522,19 @@ static int process_cpu_timer_create(struct k_itimer *timer)
timer->it_clock = PROCESS_CLOCK;
return posix_cpu_timer_create(timer);
}
-static int process_cpu_nsleep(clockid_t which_clock, int flags,
- struct timespec *rqtp)
+static int process_cpu_nsleep(const clockid_t which_clock, int flags,
+ struct timespec *rqtp,
+ struct timespec __user *rmtp)
{
- return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp);
+ return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp, rmtp);
}
-static int thread_cpu_clock_getres(clockid_t which_clock, struct timespec *tp)
+static int thread_cpu_clock_getres(const clockid_t which_clock,
+ struct timespec *tp)
{
return posix_cpu_clock_getres(THREAD_CLOCK, tp);
}
-static int thread_cpu_clock_get(clockid_t which_clock, struct timespec *tp)
+static int thread_cpu_clock_get(const clockid_t which_clock,
+ struct timespec *tp)
{
return posix_cpu_clock_get(THREAD_CLOCK, tp);
}
@@ -1545,8 +1543,8 @@ static int thread_cpu_timer_create(struct k_itimer *timer)
timer->it_clock = THREAD_CLOCK;
return posix_cpu_timer_create(timer);
}
-static int thread_cpu_nsleep(clockid_t which_clock, int flags,
- struct timespec *rqtp)
+static int thread_cpu_nsleep(const clockid_t which_clock, int flags,
+ struct timespec *rqtp, struct timespec __user *rmtp)
{
return -EINVAL;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 15:28:06 +0000