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-rw-r--r--kernel/posix-cpu-timers.c40
1 files changed, 22 insertions, 18 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 4c68edff900b..abf6990c6eb5 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -7,7 +7,7 @@
7#include <asm/uaccess.h> 7#include <asm/uaccess.h>
8#include <linux/errno.h> 8#include <linux/errno.h>
9 9
10static int check_clock(clockid_t which_clock) 10static int check_clock(const clockid_t which_clock)
11{ 11{
12 int error = 0; 12 int error = 0;
13 struct task_struct *p; 13 struct task_struct *p;
@@ -31,7 +31,7 @@ static int check_clock(clockid_t which_clock)
31} 31}
32 32
33static inline union cpu_time_count 33static inline union cpu_time_count
34timespec_to_sample(clockid_t which_clock, const struct timespec *tp) 34timespec_to_sample(const clockid_t which_clock, const struct timespec *tp)
35{ 35{
36 union cpu_time_count ret; 36 union cpu_time_count ret;
37 ret.sched = 0; /* high half always zero when .cpu used */ 37 ret.sched = 0; /* high half always zero when .cpu used */
@@ -43,7 +43,7 @@ timespec_to_sample(clockid_t which_clock, const struct timespec *tp)
43 return ret; 43 return ret;
44} 44}
45 45
46static void sample_to_timespec(clockid_t which_clock, 46static void sample_to_timespec(const clockid_t which_clock,
47 union cpu_time_count cpu, 47 union cpu_time_count cpu,
48 struct timespec *tp) 48 struct timespec *tp)
49{ 49{
@@ -55,7 +55,7 @@ static void sample_to_timespec(clockid_t which_clock,
55 } 55 }
56} 56}
57 57
58static inline int cpu_time_before(clockid_t which_clock, 58static inline int cpu_time_before(const clockid_t which_clock,
59 union cpu_time_count now, 59 union cpu_time_count now,
60 union cpu_time_count then) 60 union cpu_time_count then)
61{ 61{
@@ -65,7 +65,7 @@ static inline int cpu_time_before(clockid_t which_clock,
65 return cputime_lt(now.cpu, then.cpu); 65 return cputime_lt(now.cpu, then.cpu);
66 } 66 }
67} 67}
68static inline void cpu_time_add(clockid_t which_clock, 68static inline void cpu_time_add(const clockid_t which_clock,
69 union cpu_time_count *acc, 69 union cpu_time_count *acc,
70 union cpu_time_count val) 70 union cpu_time_count val)
71{ 71{
@@ -75,7 +75,7 @@ static inline void cpu_time_add(clockid_t which_clock,
75 acc->cpu = cputime_add(acc->cpu, val.cpu); 75 acc->cpu = cputime_add(acc->cpu, val.cpu);
76 } 76 }
77} 77}
78static inline union cpu_time_count cpu_time_sub(clockid_t which_clock, 78static inline union cpu_time_count cpu_time_sub(const clockid_t which_clock,
79 union cpu_time_count a, 79 union cpu_time_count a,
80 union cpu_time_count b) 80 union cpu_time_count b)
81{ 81{
@@ -151,7 +151,7 @@ static inline unsigned long long sched_ns(struct task_struct *p)
151 return (p == current) ? current_sched_time(p) : p->sched_time; 151 return (p == current) ? current_sched_time(p) : p->sched_time;
152} 152}
153 153
154int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *tp) 154int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp)
155{ 155{
156 int error = check_clock(which_clock); 156 int error = check_clock(which_clock);
157 if (!error) { 157 if (!error) {
@@ -169,7 +169,7 @@ int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *tp)
169 return error; 169 return error;
170} 170}
171 171
172int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp) 172int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp)
173{ 173{
174 /* 174 /*
175 * You can never reset a CPU clock, but we check for other errors 175 * 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)
186/* 186/*
187 * Sample a per-thread clock for the given task. 187 * Sample a per-thread clock for the given task.
188 */ 188 */
189static int cpu_clock_sample(clockid_t which_clock, struct task_struct *p, 189static int cpu_clock_sample(const clockid_t which_clock, struct task_struct *p,
190 union cpu_time_count *cpu) 190 union cpu_time_count *cpu)
191{ 191{
192 switch (CPUCLOCK_WHICH(which_clock)) { 192 switch (CPUCLOCK_WHICH(which_clock)) {
@@ -248,7 +248,7 @@ static int cpu_clock_sample_group_locked(unsigned int clock_idx,
248 * Sample a process (thread group) clock for the given group_leader task. 248 * Sample a process (thread group) clock for the given group_leader task.
249 * Must be called with tasklist_lock held for reading. 249 * Must be called with tasklist_lock held for reading.
250 */ 250 */
251static int cpu_clock_sample_group(clockid_t which_clock, 251static int cpu_clock_sample_group(const clockid_t which_clock,
252 struct task_struct *p, 252 struct task_struct *p,
253 union cpu_time_count *cpu) 253 union cpu_time_count *cpu)
254{ 254{
@@ -262,7 +262,7 @@ static int cpu_clock_sample_group(clockid_t which_clock,
262} 262}
263 263
264 264
265int posix_cpu_clock_get(clockid_t which_clock, struct timespec *tp) 265int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp)
266{ 266{
267 const pid_t pid = CPUCLOCK_PID(which_clock); 267 const pid_t pid = CPUCLOCK_PID(which_clock);
268 int error = -EINVAL; 268 int error = -EINVAL;
@@ -1399,7 +1399,7 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx,
1399 1399
1400static long posix_cpu_clock_nanosleep_restart(struct restart_block *); 1400static long posix_cpu_clock_nanosleep_restart(struct restart_block *);
1401 1401
1402int posix_cpu_nsleep(clockid_t which_clock, int flags, 1402int posix_cpu_nsleep(const clockid_t which_clock, int flags,
1403 struct timespec *rqtp) 1403 struct timespec *rqtp)
1404{ 1404{
1405 struct restart_block *restart_block = 1405 struct restart_block *restart_block =
@@ -1503,11 +1503,13 @@ posix_cpu_clock_nanosleep_restart(struct restart_block *restart_block)
1503#define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED) 1503#define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED)
1504#define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED) 1504#define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED)
1505 1505
1506static int process_cpu_clock_getres(clockid_t which_clock, struct timespec *tp) 1506static int process_cpu_clock_getres(const clockid_t which_clock,
1507 struct timespec *tp)
1507{ 1508{
1508 return posix_cpu_clock_getres(PROCESS_CLOCK, tp); 1509 return posix_cpu_clock_getres(PROCESS_CLOCK, tp);
1509} 1510}
1510static int process_cpu_clock_get(clockid_t which_clock, struct timespec *tp) 1511static int process_cpu_clock_get(const clockid_t which_clock,
1512 struct timespec *tp)
1511{ 1513{
1512 return posix_cpu_clock_get(PROCESS_CLOCK, tp); 1514 return posix_cpu_clock_get(PROCESS_CLOCK, tp);
1513} 1515}
@@ -1516,16 +1518,18 @@ static int process_cpu_timer_create(struct k_itimer *timer)
1516 timer->it_clock = PROCESS_CLOCK; 1518 timer->it_clock = PROCESS_CLOCK;
1517 return posix_cpu_timer_create(timer); 1519 return posix_cpu_timer_create(timer);
1518} 1520}
1519static int process_cpu_nsleep(clockid_t which_clock, int flags, 1521static int process_cpu_nsleep(const clockid_t which_clock, int flags,
1520 struct timespec *rqtp) 1522 struct timespec *rqtp)
1521{ 1523{
1522 return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp); 1524 return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp);
1523} 1525}
1524static int thread_cpu_clock_getres(clockid_t which_clock, struct timespec *tp) 1526static int thread_cpu_clock_getres(const clockid_t which_clock,
1527 struct timespec *tp)
1525{ 1528{
1526 return posix_cpu_clock_getres(THREAD_CLOCK, tp); 1529 return posix_cpu_clock_getres(THREAD_CLOCK, tp);
1527} 1530}
1528static int thread_cpu_clock_get(clockid_t which_clock, struct timespec *tp) 1531static int thread_cpu_clock_get(const clockid_t which_clock,
1532 struct timespec *tp)
1529{ 1533{
1530 return posix_cpu_clock_get(THREAD_CLOCK, tp); 1534 return posix_cpu_clock_get(THREAD_CLOCK, tp);
1531} 1535}
@@ -1534,7 +1538,7 @@ static int thread_cpu_timer_create(struct k_itimer *timer)
1534 timer->it_clock = THREAD_CLOCK; 1538 timer->it_clock = THREAD_CLOCK;
1535 return posix_cpu_timer_create(timer); 1539 return posix_cpu_timer_create(timer);
1536} 1540}
1537static int thread_cpu_nsleep(clockid_t which_clock, int flags, 1541static int thread_cpu_nsleep(const clockid_t which_clock, int flags,
1538 struct timespec *rqtp) 1542 struct timespec *rqtp)
1539{ 1543{
1540 return -EINVAL; 1544 return -EINVAL;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 00:06:38 -0500