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    SubjectRe: 3Dfx module broken on 2.2.3

    Yes, it is broken. There were two changes to mm/mmap.c:

    a) in do_mmap()
    vma->vm_file = file;

    b) in do_munmap()

    errno = -EINVAL; instead of 0, because Single UNIX v2 says so.

    I have just checked that it is *not* b) that breaks it (thank heaven - for
    b) was my patch :)

    It appears that a /dev/3dfx usage count (file->f_count) is incremented but
    not decremented. So I am suspicious of a) - perhaps there should be a
    corresponding file->f_count-- in do_munmap() ?

    I am trying to fix it now - will let you know if any luck.


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