to make use of {sem,shm,msg}ctl IPC_STAT functionality to provide 64-bit time_t on 32-bit archs, IPC_STAT and related macros must be defined with bit 8 (0x100) set. allow archs to define IPC_STAT in bits/ipc.h, and define the other macros in terms of it so that they all get the same value of the time64 bit.
introduced to stat ipc objects without permission checks since the info is available in /proc/sysvipc anyway, new in linux commits 23c8cec8cf679b10997a512abb1e86f0cedc42ba a280d6dc77eb6002f269d58cd47c7c7e69b617b6 c21a6970ae727839a2f300cd8dd957de0d0238c3
patch by Arvid Picciani (aep)
some of these definitions were just plain wrong, others based on outdated ancient "non-64" versions of the kernel interface. as much as possible has now been moved out of bits/* these changes break abi (the old abi for these functions was wrong), but since they were not working anyway it can hardly matter.