uml: GENERIC_TIME support

Enable CONFIG_GENERIC_TIME.

As a side-effect of this, the UML implementations of do_gettimeofday and
do_settimeofday go away, as these are provided by generic code.  set_time also
goes away since it was only used by do_settimeofday.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 5 insertions, 43 deletions

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 4aabb334a84e..53597bbcd7b0 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -55,6 +55,10 @@ config GENERIC_BUG
         default y
         depends on BUG
 
+config GENERIC_TIME
+        bool
+        default y
+
 # Used in kernel/irq/manage.c and include/linux/irq.h
 config IRQ_RELEASE_METHOD
         bool
@@ -75,6 +79,7 @@ config STATIC_LINK
 
 source "arch/um/Kconfig.arch"
 source "mm/Kconfig"
+source "kernel/time/Kconfig"
 
 config LD_SCRIPT_STATIC
         bool
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 4b750014925d..1b388b41d95d 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -67,9 +67,6 @@ EXPORT_SYMBOL(run_helper);
 EXPORT_SYMBOL(start_thread);
 EXPORT_SYMBOL(dump_thread);
 
-EXPORT_SYMBOL(do_gettimeofday);
-EXPORT_SYMBOL(do_settimeofday);
-
 #ifdef CONFIG_SMP
 
 /* required for SMP */
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 758d4f9cb22a..7678bcf830ba 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -123,46 +123,6 @@ void time_init(void)
         late_time_init = register_timer;
 }
 
-void do_gettimeofday(struct timeval *tv)
-{
-#ifdef CONFIG_UML_REAL_TIME_CLOCK
-        unsigned long long nsecs = get_time();
-#else
-        unsigned long long nsecs = (unsigned long long) xtime.tv_sec * BILLION +
-                xtime.tv_nsec;
-#endif
-        tv->tv_sec = nsecs / NSEC_PER_SEC;
-        /*
-         * Careful about calculations here - this was originally done as
-         * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC
-         * which gave bogus (> 1000000) values.  Dunno why, suspect gcc
-         * (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion
-         * problem that I missed.
-         */
-        nsecs -= tv->tv_sec * NSEC_PER_SEC;
-        tv->tv_usec = (unsigned long) nsecs / NSEC_PER_USEC;
-}
-
-static inline void set_time(unsigned long long nsecs)
-{
-        unsigned long long now;
-        unsigned long flags;
-
-        spin_lock_irqsave(&timer_spinlock, flags);
-        now = os_nsecs();
-        local_offset = nsecs - now;
-        spin_unlock_irqrestore(&timer_spinlock, flags);
-
-        clock_was_set();
-}
-
-int do_settimeofday(struct timespec *tv)
-{
-        set_time((unsigned long long) tv->tv_sec * NSEC_PER_SEC + tv->tv_nsec);
-
-        return 0;
-}
-
 void timer_handler(int sig, struct uml_pt_regs *regs)
 {
         if (current_thread->cpu == 0)