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    SubjectRe: [PATCH] 32-bit UID support for 2.3.36
    Date
    From: "Andrea Arcangeli" <andrea@suse.de>
    To: "Chris Wing" <wingc@engin.umich.edu>
    Cc: <linux-kernel@vger.rutgers.edu>
    Sent: Thursday, January 06, 2000 12:53 PM
    Subject: Re: [PATCH] 32-bit UID support for 2.3.36


    > On Thu, 6 Jan 2000, Chris Wing wrote:
    >
    > > linux-ipc.patch
    > >
    > > Support for 32-bit UIDs in SysVipc: message queues,
    > > semaphores, and shared memory.
    > > Also fixes the ABI breakage on Alpha.
    >
    > Your fix is not necessary. In 2.3.36 alpha uses a particular shmctl
    > syscall. If somebody need more than 32bit for specifying the size he
    > should simply use the new syscall (that recalls the raw ipc/shm.c code).
    > So you don't need to touch this issue anymore in your patches. Left it a
    > size_t.

    Yes, but your patch adds a third binary structure for shmid_ds:

    * before 2.3.1x: int shm_segsz, short pid
    * 2.3.36: size_t shm_segsz, short pid
    * Chris' patch: size_t shm_segsz, int pid

    If Chris' patch gets into 2.4, then "size_t shm_segsz, short pid" is
    superflous, and I would prefer if we could drop it before 2.4. If we support
    it in 2.4 then we won't be able to drop it during the next 10 years.

    --
    Manfred


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