AcoSail/kernel_optimize_test
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kmsg: use do_div() to divide 64bit integer

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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>
This commit is contained in:
Kay Sievers 2012-05-08 13:04:17 +02:00 committed by Greg Kroah-Hartman
parent a9e73211fb
commit 5fc3249068
1 changed files with 4 additions and 1 deletions
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5
kernel/printk.c
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@ -407,6 +407,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
{
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 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
}
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++) {