• David Howells's avatar
    [PATCH] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU · b0e15190
    David Howells authored
    The attached patch makes the SYSV IPC shared memory facilities use the new
    ramfs facilities on a no-MMU kernel.
    The following changes are made:
     (1) There are now shmem_mmap() and shmem_get_unmapped_area() functions to
         allow the IPC SHM facilities to commune with the tiny-shmem and shmem
     (2) ramfs files now need resizing using do_truncate() rather than by modifying
         the inode size directly (see shmem_file_setup()). This causes ramfs to
         attempt to bind a block of pages of sufficient size to the inode.
     (3) CONFIG_SYSVIPC is no longer contingent on CONFIG_MMU.
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
nommu.c 27.6 KB