kmsg: use do_div() to divide 64bit integer
On Tue, May 8, 2012 at 10:02 AM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> kernel/built-in.o: In function `devkmsg_read':
> printk.c:(.text+0x27e8): undefined reference to `__udivdi3'
> Most probably the "msg->ts_nsec / 1000" since
> ts_nsec is a u64 and this is a 32 bit build ...
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/kernel/printk.c b/kernel/printk.c
index 1ccc6d9..96d4cc8 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -407,6 +407,7 @@
{
struct devkmsg_user *user = file->private_data;
struct log *msg;
+ u64 ts_usec;
size_t i;
size_t len;
ssize_t ret;
@@ -441,8 +442,10 @@
}
msg = log_from_idx(user->idx);
+ ts_usec = msg->ts_nsec;
+ do_div(ts_usec, 1000);
len = sprintf(user->buf, "%u,%llu,%llu;",
- msg->level, user->seq, msg->ts_nsec / 1000);
+ msg->level, user->seq, ts_usec);
/* escape non-printable characters */
for (i = 0; i < msg->text_len; i++) {
