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uml: time build fix

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Put back an implementation of timeval_to_ns in arch/um/os-Linux/time.c.
tglx pointed out in his review of tickless support that there was a
perfectly good implementation of it in linux/time.h.  The problem is that
this is userspace code which can't pull in kernel headers and there doesn't
seem to be a libc version.

So, I'm copying the version from linux/time.h rather than resurrecting my
version.  This causes some declaration changes as it now returns a signed
value rather than an unsigned value.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike 2007-10-16 01:27:27 -07:00 committed by Linus Torvalds
parent b160fb6309
commit 5f734614fc
2 changed files with 21 additions and 5 deletions
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4
arch/um/include/os.h
View File

@ -254,9 +254,9 @@ extern void os_dump_core(void);
extern void idle_sleep(unsigned long long nsecs);
extern int set_interval(void);
extern int timer_one_shot(int ticks);
extern unsigned long long disable_timer(void);
extern long long disable_timer(void);
extern void uml_idle_timer(void);
extern unsigned long long os_nsecs(void);
extern long long os_nsecs(void);
/* skas/mem.c */
extern long run_syscall_stub(struct mm_id * mm_idp,

22
arch/um/os-Linux/time.c
View File

@ -39,7 +39,23 @@ int timer_one_shot(int ticks)
return 0;
}
unsigned long long disable_timer(void)
/**
* timeval_to_ns - Convert timeval to nanoseconds
* @ts: pointer to the timeval variable to be converted
*
* Returns the scalar nanosecond representation of the timeval
* parameter.
*
* Ripped from linux/time.h because it's a kernel header, and thus
* unusable from here.
*/
static inline long long timeval_to_ns(const struct timeval *tv)
{
return ((long long) tv->tv_sec * UM_NSEC_PER_SEC) +
tv->tv_usec * UM_NSEC_PER_USEC;
}
long long disable_timer(void)
{
struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } });
@ -47,10 +63,10 @@ unsigned long long disable_timer(void)
printk(UM_KERN_ERR "disable_timer - setitimer failed, "
"errno = %d\n", errno);
return tv_to_nsec(&time.it_value);
return timeval_to_ns(&time.it_value);
}
unsigned long long os_nsecs(void)
long long os_nsecs(void)
{
struct timeval tv;