I did a build for H4, using the CodeSourcery 2007q3-53 toolchain, and:
CC kernel/sched.o
/tmp/ccePvKYj.s: Assembler messages:
/tmp/ccePvKYj.s:16: rdhi, rdlo and rm must all be different
/tmp/ccePvKYj.s:1243: rdhi, rdlo and rm must all be different
The problem doesn't crop up with a build for OSK; different CPUs,
presumably. It turns out these are both umull instructions; if
I "make kernel/sched.s" and build the result, the relevant lines
have different numbers but match up as:
sched_clock:
16: umull r0, r1, r0, r3 @ tmp136, jiffies.371, tmp137
sched_slice:
...
1243: umull r0, r1, r0, r2 @ slice.2262, slice, <variable>.load.weight
So this all looks suspiciously buglike. Does anyone know how
to fix this issue? Is it really a problem?
- Dave
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