On 3/4/07, Rafał Bilski <rafalbilski@xxxxxxxxxx> wrote:> Hi!>> I'm trying to make Longhaul compatible with NO_HZ. Problem is> that transition takes much more time. I was trying to check if> my code really works but when I'm:> (int)((timespec_to_ns(&tv_out) - timespec_to_ns(&tv_in)) / 1000)> Or:> tv_delta = timespec_sub(tv_out, tv_in);> delta_us = timespec_to_ns(&tv_delta) / 1000;> printk(KERN_INFO PFX "Delay %dus\n", (int)(delta_us));> I get this error:> LD .tmp_vmlinux1> arch/i386/kernel/built-in.o: In function `longhaul_setstate':> longhaul.c:(.text+0x8591): undefined reference to `__divdi3'> make: *** [.tmp_vmlinux1] Błąd 1> What have I missed? Is it illegal to convert s64 to int in this way?
It's disgusting :)
No, the problem is that you can't do 64-bit division without helperfunctions, in the kernel. You want do_div(), iirc, if you really wantto do the division.
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