* guix/cpio.scm (device-number, device->major+minor):
Move to, and subsequently import from, …
* guix/build/syscalls.scm (device-number, device-number->major+minor):
…here. Note the slight name change.
(mounts): Replace 16-bit open code with a DEVICE-NUMBER call.
* gnu/build/linux-boot.scm (device-number):
Remove duplicate 16-bit implementation in favour of the one above.
(resume-if-hibernated): Reuse DEVICE-NUMBER->MAJOR+MINOR.
“dev_t in glibc is a 64-bit quantity, with 32-bit major and minor
numbers.” — glibc's <bits/sysmacros.h>
The "tests/cpio.scm" was failing because (guix cpio) treated it as a
16-bit quantity instead, leading to header mismatches with the GNU cpio
reference output.
* guix/cpio.scm (device-number, device->major+minor): Use all the bits.
