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>

3 files changed, 4 insertions, 70 deletions

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 89223a9bff2..aa2c55e3b55 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -133,72 +133,6 @@ asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
 	return sys_ftruncate(fd, merge_64(a2, a3));
 }
 
-static inline long
-get_tv32(struct timeval *o, struct compat_timeval __user *i)
-{
-	return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
-		(__get_user(o->tv_sec, &i->tv_sec) |
-		 __get_user(o->tv_usec, &i->tv_usec)));
-}
-
-static inline long
-put_tv32(struct compat_timeval __user *o, struct timeval *i)
-{
-	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
-		(__put_user(i->tv_sec, &o->tv_sec) |
-		 __put_user(i->tv_usec, &o->tv_usec)));
-}
-
-extern struct timezone sys_tz;
-
-asmlinkage int
-sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
-{
-	if (tv) {
-		struct timeval ktv;
-		do_gettimeofday(&ktv);
-		if (put_tv32(tv, &ktv))
-			return -EFAULT;
-	}
-	if (tz) {
-		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
-{
-	long usec;
-
-	if (!access_ok(VERIFY_READ, i, sizeof(*i)))
-		return -EFAULT;
-	if (__get_user(o->tv_sec, &i->tv_sec))
-		return -EFAULT;
-	if (__get_user(usec, &i->tv_usec))
-		return -EFAULT;
-	o->tv_nsec = usec * 1000;
-		return 0;
-}
-
-asmlinkage int
-sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
-{
-	struct timespec kts;
-	struct timezone ktz;
-
- 	if (tv) {
-		if (get_ts32(&kts, tv))
-			return -EFAULT;
-	}
-	if (tz) {
-		if (copy_from_user(&ktz, tz, sizeof(ktz)))
-			return -EFAULT;
-	}
-
-	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
-}
-
 asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
 			    unsigned int offset_low, loff_t __user * result,
 			    unsigned int origin)
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 324c5499dec..e266b3aa656 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -214,7 +214,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_fchown
 	PTR	sys_lchown
 	PTR	sys_umask
-	PTR	sys32_gettimeofday
+	PTR	compat_sys_gettimeofday
 	PTR	compat_sys_getrlimit		/* 6095 */
 	PTR	compat_sys_getrusage
 	PTR	compat_sys_sysinfo
@@ -279,7 +279,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_chroot
 	PTR	sys_sync
 	PTR	sys_acct
-	PTR	sys32_settimeofday
+	PTR	compat_sys_settimeofday
 	PTR	compat_sys_mount		/* 6160 */
 	PTR	sys_umount
 	PTR	sys_swapon
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 85fedac99a5..6c7ef8313eb 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -283,8 +283,8 @@ sys_call_table:
 	PTR	compat_sys_setrlimit		/* 4075 */
 	PTR	compat_sys_getrlimit
 	PTR	compat_sys_getrusage
-	PTR	sys32_gettimeofday
-	PTR	sys32_settimeofday
+	PTR	compat_sys_gettimeofday
+	PTR	compat_sys_settimeofday
 	PTR	sys_getgroups			/* 4080 */
 	PTR	sys_setgroups
 	PTR	sys_ni_syscall			/* old_select */