compat: generic compat get/settimeofday

Nothing arch specific in get/settimeofday.  The details of the timeval
conversion varied a little from arch to arch, but all with the same
results.

Also add an extern declaration for sys_tz to linux/time.h because externs
in .c files are fowned upon.  I'll kill the externs in various other files
in a sparate patch.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net> [ sparc bits ]
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 999dddd8d939..f061a1ea1b74 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -234,6 +234,11 @@ extern int get_compat_itimerspec(struct itimerspec *dst,
 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
                                  const struct itimerspec *src);
 
+asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
+                struct timezone __user *tz);
+asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
+                struct timezone __user *tz);
+
 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 
 extern int compat_printk(const char *fmt, ...);
diff --git a/include/linux/time.h b/include/linux/time.h
index e15206a7e82e..51e883df0fa5 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -29,6 +29,8 @@ struct timezone {
 
 #ifdef __KERNEL__
 
+extern struct timezone sys_tz;
+
 /* Parameters used to convert the timespec values: */
 #define MSEC_PER_SEC    1000L
 #define USEC_PER_MSEC   1000L