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[PATCH] ppc64: fix time syscall 

ppc64 has its own version of sys_time. It looks pretty scary, touching
a whole bunch of variables without any locking or memory ordering.

In fact, a recent bugreport has shown it can actually go backwards. Time
to remove it and just use the generic sys_time, which is implemented on
top of do_gettimeofday.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard 2006-01-07 00:49:49 +11:00 committed by Paul Mackerras
parent aed9c6ccb8
commit 002ec58eb5
2 changed files with 1 additions and 29 deletions
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28
arch/powerpc/kernel/syscalls.c
View File

@ -43,9 +43,6 @@
#include <asm/time.h>
#include <asm/unistd.h>
extern unsigned long wall_jiffies;
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
@ -311,31 +308,6 @@ int sys_olduname(struct oldold_utsname __user *name)
return error? -EFAULT: 0;
}
#ifdef CONFIG_PPC64
time_t sys64_time(time_t __user * tloc)
{
time_t secs;
time_t usecs;
long tb_delta = tb_ticks_since(tb_last_stamp);
tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy;
secs = xtime.tv_sec;
usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec;
while (usecs >= USEC_PER_SEC) {
++secs;
usecs -= USEC_PER_SEC;
}
if (tloc) {
if (put_user(secs,tloc))
secs = -EFAULT;
}
return secs;
}
#endif
long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
u32 len_high, u32 len_low)
{

2
arch/powerpc/kernel/systbl.S
View File

@ -54,7 +54,7 @@ SYSCALL(link)
SYSCALL(unlink)
COMPAT_SYS(execve)
SYSCALL(chdir)
SYSX(sys64_time,compat_sys_time,sys_time)
COMPAT_SYS(time)
SYSCALL(mknod)
SYSCALL(chmod)
SYSCALL(lchown)