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    SubjectRe: [PATCH 3/6] generic sys_ipc wrapper
    Date
    Christoph Hellwig <hch@lst.de> wrote:

    > Add a generic implementation of the ipc demultiplexer syscall. Except for
    > s390 and sparc64 all implementations of the sys_ipc are nearly identical.
    >
    > There are slight differences in the types of the parameters, where mips
    > and powerpc as the only 64-bit architectures with sys_ipc use unsigned long
    > for the "third" argument as it gets casted to a pointer later, while it
    > traditionally is an "int" like most other paramters. frv goes even further
    > and uses unsigned long for all parameters execept for "ptr" which is a pointer
    > type everywhere. The change from int to unsigned long for "third" and back
    > to "int" for the others on frv should be fine due to the in-register calling
    > conventions for syscalls (we already had a similar issue with the generic
    > sys_ptrace), but I'd prefer to have the arch maintainers looks over this
    > in details.
    >
    > Except for that h8300, m68k and m68knommu lack an impplementation of the
    > semtimedop sub call which this patch adds, and various architectures have
    > different strategies for the SHMAT version 1 case which apparently never
    > gets used - at least on i386 it seems superflous as the compat code on
    > x86-64 and ia64 doesn't even bother to implement it.
    >
    >
    > Signed-off-by: Christoph Hellwig <hch@lst.de>

    Acked-by: David Howells <dhowells@redhat.com>


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