use do_div
On Tue, Sep 7, 2010 at 1:02 PM, Andreas Leppert <wudmx@xxxxxx> wrote:
Hello,
I have encountered a problem on my 32 bit machine. Here some code
snippets:
typedef signed long s64;
asmlinkage long sys_optStopMeasure(int __user workamount) {
s64 currentPerformance, currentTimePerWork;
...
currentTimePerWork = currentPerformance / workamount;
...
}
When I run a make, I get this error at the end:
LD vmlinux.o
MODPOST vmlinux.o
GEN .version
CHK include/generated/compile.h
UPD include/generated/compile.h
CC init/version.o
LD init/built-in.o
LD .tmp_vmlinux1
optimizer/built-in.o: In function `sys_optStopMeasure':
/source/trunk/linux-2.6.34/optimizer/sys_optStopMeasure.c:144: undefined
reference to `__divdi3'
Another person which has tried the code had no problems - he compiled
the code for a 64 bit machine. Can you explain to me the problem? Why
does the code work on 64 but not on 32 bit?
I've looked for some workarounds and found do_div(). Is this the way to
go? Or are there better ways?
Thanks for your help!
Andreas
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