1. 26 Oct, 2010 1 commit
  2. 11 Feb, 2007 1 commit
    • Jean-Paul Saman's avatar
      [PATCH] disable init/initramfs.c · c33df4ea
      Jean-Paul Saman authored
      The file init/initramfs.c is always compiled and linked in the kernel
      vmlinux even when BLK_DEV_RAM and BLK_DEV_INITRD are disabled and the
      system isn't using any form of an initramfs or initrd.  In this situation
      the code is only used to unpack a (static) default initial rootfilesystem.
      The current init/initramfs.c code.  usr/initramfs_data.o compiles to a size
      of ~15 kbytes.  Disabling BLK_DEV_RAM and BLK_DEV_INTRD shrinks the kernel
      code size with ~60 Kbytes.
      
      This patch avoids compiling in the code and data for initramfs support if
      CONFIG_BLK_DEV_INITRD is not defined.  Instead of the initramfs code and
      data it uses a small routine in init/noinitramfs.c to setup an initial
      static default environment for mounting a rootfilesystem later on in the
      kernel initialisation process.  The new code is: 164 bytes of size.
      
      The patch is separated in two parts:
      1) doesn't compile initramfs code when CONFIG_BLK_DEV_INITRD is not set
      2) changing all plaforms vmlinux.lds.S files to not reserve an area of
      PAGE_SIZE when CONFIG_BLK_DEV_INITRD is not set.
      
      [deweerdt@free.fr: warning fix]
      Signed-off-by: default avatarJean-Paul Saman <jean-paul.saman@nxp.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: default avatarFrederik Deweerdt <frederik.deweerdt@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c33df4ea