[PATCH] s390: 32 bit ioctl emulation fixes.
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - audit all 32 bit pointer accesses and make them use compat_ioctl(), because of the necessary conversion on s390 - introduce ULONG_IOCTL() which is used instead of COMPATIBLE_IOCTL() for all ioctls that have their argument encoded in 'arg' instead of the memory pointed to by arg. Same reason as above. - remove most #ifdefs in <linux/compat_ioctl.h>: They don't make any sense if the respective handlers in fs/compat_ioctl.c are not disabled as well and they are potentially harmful (the CONFIG_BLK_DEV_DM e.g. was insufficient). - comment out COMPATIBLE_IOCTL(SIOCSIFBR) and COMPATIBLE_IOCTL(SIOCGIFBR), they appear to require a handler - implement copy_in_user for s390, as needed for many handlers in fs/compat_ioctl.c - get rid of all duplicate stuff in arch/s390/kernel/compat_ioctl.c that is also in fs/compat_ioctl.c
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