times(2) sys call bug?

[Paul Mackerras]

Joakim Tjernlund writes:

> This little hack changes the kernel sys call handling in an crude
> way and then it works. Apperently the kernel thinks is an error if the
> syscall returns a value between -_LAST_ERRNO and -1.

Try this patch and let me if it fixes it.  If it does I'll push it
upstream.

Paul.

diff --git a/kernel/sys.c b/kernel/sys.c
index 31deba8..1bf8c5c 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -33,6 +33,7 @@
 #include <linux/task_io_accounting_ops.h>
 #include <linux/seccomp.h>
 #include <linux/cpu.h>
+#include <linux/ptrace.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -878,6 +879,7 @@ asmlinkage long sys_times(struct tms __user * tbuf)
 		if (copy_to_user(tbuf, &tmp, sizeof(struct tms)))
 			return -EFAULT;
 	}
+	force_successful_syscall_return();
 	return (long) jiffies_64_to_clock_t(get_jiffies_64());
 }