Bug 2363674

1. Please describe the problem:

Userspace started to FTBFS due to a dependency issue in the ppc64le headers, where asm/ioctls.h depends on struct termio, which is provided by asm/termios.h.
At minimum, asm/ioctls.h is missing an inclusion of a header.
However, considering that old glibc versions also provide struct termio, it would be ideal to split termio-specific code into its own header.

2. What is the Version-Release number of the kernel:
6.15.0-0.rc2.22.fc43.ppc64le


3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

This used to work until glibc removed termio.h.
After the removal of that header, it exposed an implementation issue in the powerpc-specific headers of the kernel.


4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

$ cat tst-ioctls.c 
#include <stddef.h>
#include <termios.h>
#include <asm/ioctls.h>
//#include <asm/termios.h>


size_t get_termios_sz() {
  return sizeof(struct termios);
}

int get_TCGETA() {
  return TCGETA;
}
$ gcc tst-ioctls.c 
In file included from /usr/include/asm/ioctl.h:12,
                 from /usr/include/asm/ioctls.h:5,
                 from tst-ioctls.c:3:
tst-ioctls.c: In function 'get_TCGETA':
tst-ioctls.c:12:10: error: invalid application of 'sizeof' to incomplete type 'struct termio'
   12 |   return TCGETA;
      |          ^~~~~~


5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

Yes.

6. Are you running any modules that not shipped with directly Fedora's kernel?:
No.

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

Reproducible: Always