This patchset enables the SquashFS driver to load data directly from a linear adressed memory range (usually non volatile memory like flash) instead of going through the block device layer. This saves some memory since no intermediate buffering is necessary. The location of the SquashFs image need to be specified by using the physaddr=0x******** mount option. For example, mount -t squashfs_linear -o physaddr=0x100000 none /mnt In addition, the linear SquashFS image can be used as a root file system. To actually have the kernel mount this SquashFS image as a root file system, you must also pass the command line parameter "root=/dev/null", "rootfstype=squashfs_linear", and "rootflags=physaddr=0x********" to the kernel (replace 0x******** with the physical address location of the linear SquashFs image to boot with). UCHINO Satoshi (2): squashfs: add an extra argument to decompress callback squashfs: support linear addressing fs/squashfs/Kconfig | 25 +++++++ fs/squashfs/block.c | 72 ++++++++++++++++++--- fs/squashfs/decompressor.h | 6 +- fs/squashfs/inode.c | 10 +++ fs/squashfs/lzo_wrapper.c | 12 +++- fs/squashfs/squashfs.h | 5 ++ fs/squashfs/squashfs_fs_sb.h | 2 + fs/squashfs/super.c | 144 +++++++++++++++++++++++++++++++++++++++--- fs/squashfs/xz_wrapper.c | 7 ++- fs/squashfs/zlib_wrapper.c | 7 ++- 10 files changed, 265 insertions(+), 25 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
