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    Subject[patch] Re: Linux 2.4.5-ac6
    On Fri, Jun 01, 2001 at 10:27:09PM -0400, Tom Vier wrote:
    > > o Fix mmap cornercase (Maciej Rozycki)
    >
    > when i try running osf/1 netscape on alpha, mmap of libXmu fails. works fine
    > on -ac5.

    Indeed. Netscape is essentially 32 bit application, so probably
    it treats TASK_UNMAPPED_BASE (0x20000000000) as failure.
    A tad more respect of specified address fixes that.
    Also small fix for endless compile warnings with gcc 3.0 on
    alpha (`struct mm_struct' declared inside parameter list).

    Ivan.

    --- 2.4.5-ac7/mm/mmap.c Mon Jun 4 14:19:02 2001
    +++ linux/mm/mmap.c Mon Jun 4 19:22:31 2001
    @@ -404,10 +404,13 @@ static inline unsigned long arch_get_unm

    if (addr) {
    addr = PAGE_ALIGN(addr);
    - vma = find_vma(current->mm, addr);
    - if (TASK_SIZE - len >= addr &&
    - (!vma || addr + len <= vma->vm_start))
    - return addr;
    + for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
    + if (TASK_SIZE - len < addr)
    + break;
    + if (!vma || addr + len <= vma->vm_start)
    + return addr;
    + addr = vma->vm_end;
    + }
    }
    addr = PAGE_ALIGN(TASK_UNMAPPED_BASE);

    --- 2.4.5-ac7/include/linux/binfmts.h Mon Jun 4 14:19:00 2001
    +++ linux/include/linux/binfmts.h Mon Jun 4 20:24:50 2001
    @@ -32,6 +32,9 @@ struct linux_binprm{
    unsigned long loader, exec;
    };

    +/* Forward declaration */
    +struct mm_struct;
    +
    /*
    * This structure defines the functions that are used to load the binary formats that
    * linux accepts.
    -
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