- Some architectures must align 64-bit integers into an aligned
pair of registers. A slot may be wasted for padding.
- S390 may not have a 64-bit integer in slots 5/6.
Uhm, doesn't sys_sync_file_range2 break that?
+asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int
flags,
+ unsigned offset_hi, unsigned
offset_lo,
+ unsigned nbytes_hi, unsigned
nbytes_lo)
I don't see any 64-bit integers here.
Also, you might want to put something in the syscall file about signed
vs unsigned arguments and how they behave with 32-on-64 systems.
"Both work / unsigned is better / use unsigned whenever
possible" -- but that's true for all C coding. Wouldn't
hurt to repeat it though :-)
Segher
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