diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/um/include/os.h | 5 | ||||
-rw-r--r-- | arch/um/kernel/process.c | 7 | ||||
-rw-r--r-- | arch/um/os-Linux/signal.c | 3 | ||||
-rw-r--r-- | arch/um/os-Linux/time.c | 54 |
4 files changed, 17 insertions, 52 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h index e4f2fe11ba50..91642e4137d7 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h | |||
@@ -251,11 +251,10 @@ extern void os_dump_core(void); | |||
251 | /* time.c */ | 251 | /* time.c */ |
252 | #define BILLION (1000 * 1000 * 1000) | 252 | #define BILLION (1000 * 1000 * 1000) |
253 | 253 | ||
254 | extern int switch_timers(int to_real); | 254 | extern void idle_sleep(unsigned long long nsecs); |
255 | extern void idle_sleep(int secs); | ||
256 | extern int set_interval(void); | 255 | extern int set_interval(void); |
257 | extern int timer_one_shot(int ticks); | 256 | extern int timer_one_shot(int ticks); |
258 | extern void disable_timer(void); | 257 | extern unsigned long long disable_timer(void); |
259 | extern void uml_idle_timer(void); | 258 | extern void uml_idle_timer(void); |
260 | extern unsigned long long os_nsecs(void); | 259 | extern unsigned long long os_nsecs(void); |
261 | 260 | ||
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index aef494b6b81a..0eae00b3e588 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c | |||
@@ -235,6 +235,8 @@ void initial_thread_cb(void (*proc)(void *), void *arg) | |||
235 | 235 | ||
236 | void default_idle(void) | 236 | void default_idle(void) |
237 | { | 237 | { |
238 | unsigned long long nsecs; | ||
239 | |||
238 | while(1) { | 240 | while(1) { |
239 | /* endless idle loop with no priority at all */ | 241 | /* endless idle loop with no priority at all */ |
240 | 242 | ||
@@ -246,9 +248,8 @@ void default_idle(void) | |||
246 | schedule(); | 248 | schedule(); |
247 | 249 | ||
248 | tick_nohz_stop_sched_tick(); | 250 | tick_nohz_stop_sched_tick(); |
249 | switch_timers(1); | 251 | nsecs = disable_timer(); |
250 | idle_sleep(10); | 252 | idle_sleep(nsecs); |
251 | switch_timers(0); | ||
252 | tick_nohz_restart_sched_tick(); | 253 | tick_nohz_restart_sched_tick(); |
253 | } | 254 | } |
254 | } | 255 | } |
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 53593c8b9c34..fbad174775ee 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c | |||
@@ -120,7 +120,6 @@ void (*handlers[_NSIG])(int sig, struct sigcontext *sc); | |||
120 | void handle_signal(int sig, struct sigcontext *sc) | 120 | void handle_signal(int sig, struct sigcontext *sc) |
121 | { | 121 | { |
122 | unsigned long pending = 1UL << sig; | 122 | unsigned long pending = 1UL << sig; |
123 | int timer = switch_timers(0); | ||
124 | 123 | ||
125 | do { | 124 | do { |
126 | int nested, bail; | 125 | int nested, bail; |
@@ -157,8 +156,6 @@ void handle_signal(int sig, struct sigcontext *sc) | |||
157 | if (!nested) | 156 | if (!nested) |
158 | pending = from_irq_stack(nested); | 157 | pending = from_irq_stack(nested); |
159 | } while (pending); | 158 | } while (pending); |
160 | |||
161 | switch_timers(timer); | ||
162 | } | 159 | } |
163 | 160 | ||
164 | extern void hard_handler(int sig); | 161 | extern void hard_handler(int sig); |
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c index 9ffc61ac8ed6..d2cb161ae2b3 100644 --- a/arch/um/os-Linux/time.c +++ b/arch/um/os-Linux/time.c | |||
@@ -12,8 +12,6 @@ | |||
12 | #include "os.h" | 12 | #include "os.h" |
13 | #include "user.h" | 13 | #include "user.h" |
14 | 14 | ||
15 | static int is_real_timer = 0; | ||
16 | |||
17 | int set_interval(void) | 15 | int set_interval(void) |
18 | { | 16 | { |
19 | int usec = 1000000/UM_HZ; | 17 | int usec = 1000000/UM_HZ; |
@@ -41,47 +39,15 @@ int timer_one_shot(int ticks) | |||
41 | return 0; | 39 | return 0; |
42 | } | 40 | } |
43 | 41 | ||
44 | void disable_timer(void) | 42 | unsigned long long disable_timer(void) |
45 | { | 43 | { |
46 | struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }}); | 44 | struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } }); |
47 | 45 | ||
48 | if ((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) || | 46 | if(setitimer(ITIMER_VIRTUAL, &time, &time) < 0) |
49 | (setitimer(ITIMER_REAL, &disable, NULL) < 0)) | ||
50 | printk(UM_KERN_ERR "disable_timer - setitimer failed, " | 47 | printk(UM_KERN_ERR "disable_timer - setitimer failed, " |
51 | "errno = %d\n", errno); | 48 | "errno = %d\n", errno); |
52 | } | ||
53 | |||
54 | int switch_timers(int to_real) | ||
55 | { | ||
56 | struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }}); | ||
57 | struct itimerval enable; | ||
58 | int old, new, old_type = is_real_timer; | ||
59 | |||
60 | if(to_real == old_type) | ||
61 | return to_real; | ||
62 | |||
63 | if (to_real) { | ||
64 | old = ITIMER_VIRTUAL; | ||
65 | new = ITIMER_REAL; | ||
66 | } | ||
67 | else { | ||
68 | old = ITIMER_REAL; | ||
69 | new = ITIMER_VIRTUAL; | ||
70 | } | ||
71 | |||
72 | if (setitimer(old, &disable, &enable) < 0) | ||
73 | printk(UM_KERN_ERR "switch_timers - setitimer disable failed, " | ||
74 | "errno = %d\n", errno); | ||
75 | 49 | ||
76 | if((enable.it_value.tv_sec == 0) && (enable.it_value.tv_usec == 0)) | 50 | return tv_to_nsec(&time.it_value); |
77 | enable.it_value = enable.it_interval; | ||
78 | |||
79 | if (setitimer(new, &enable, NULL)) | ||
80 | printk(UM_KERN_ERR "switch_timers - setitimer enable failed, " | ||
81 | "errno = %d\n", errno); | ||
82 | |||
83 | is_real_timer = to_real; | ||
84 | return old_type; | ||
85 | } | 51 | } |
86 | 52 | ||
87 | unsigned long long os_nsecs(void) | 53 | unsigned long long os_nsecs(void) |
@@ -92,11 +58,13 @@ unsigned long long os_nsecs(void) | |||
92 | return timeval_to_ns(&tv); | 58 | return timeval_to_ns(&tv); |
93 | } | 59 | } |
94 | 60 | ||
95 | void idle_sleep(int secs) | 61 | extern void alarm_handler(int sig, struct sigcontext *sc); |
62 | |||
63 | void idle_sleep(unsigned long long nsecs) | ||
96 | { | 64 | { |
97 | struct timespec ts; | 65 | struct timespec ts = { .tv_sec = nsecs / BILLION, |
66 | .tv_nsec = nsecs % BILLION }; | ||
98 | 67 | ||
99 | ts.tv_sec = secs; | 68 | if (nanosleep(&ts, &ts) == 0) |
100 | ts.tv_nsec = 0; | 69 | alarm_handler(SIGVTALRM, NULL); |
101 | nanosleep(&ts, NULL); | ||
102 | } | 70 | } |