I'm resending this patchset because my previous post couldn't get reviewed and I was taught that it was not a good timing to get new patches reviewed. This patchset enables the SquashFS driver to load data directly from a linear addressed memory range (such as RAM, NOR flashes, etc.) 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 | 146 +++++++++++++++++++++++++++++++++++++++-- fs/squashfs/xz_wrapper.c | 7 ++- fs/squashfs/zlib_wrapper.c | 7 ++- 10 files changed, 267 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
