• Tom Spink's avatar
    uml: deal with inaccessible address space start · 40fb16a3
    Tom Spink authored
    This patch makes os_get_task_size locate the bottom of the address space,
    as well as the top.  This is for systems which put a lower limit on mmap
    addresses.  It works by manually scanning pages from zero onwards until a
    valid page is found.
    
    Because the bottom of the address space may not be zero, it's not
    sufficient to assume the top of the address space is the size of the
    address space.  The size is the difference between the top address and
    bottom address.
    
    [jdike@addtoit.com: changed the name to reflect that this function is
    supposed to return the top of the process address space, not its size and
    changed the return value to reflect that.  Also some minor formatting
    changes]
    Signed-off-by: default avatarTom Spink <tspink@gmail.com>
    Signed-off-by: default avatarJeff Dike <jdike@linux.intel.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    40fb16a3
um_arch.c 8.85 KB