From 5f734614fc6218db352d26571ab4d1604620199c Mon Sep 17 00:00:00 2001
From: Jeff Dike <jdike@addtoit.com>
Date: Tue, 16 Oct 2007 01:27:27 -0700
Subject: [PATCH] uml: time build fix
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>
---
arch/um/include/os.h | 4 ++--
arch/um/os-Linux/time.c | 22 +++++++++++++++++++---
2 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 91642e4137d7e..a1b0804ee57b8 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -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,
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index d2cb161ae2b3a..574b134f05027 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -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;
--
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