yaffs2移植到内核Linux2.6.38

在移植linux2.6.38版本内核到s3c6410时出现以下错误VFS: Cannot open root device"mtdblock2" or unknown-block（31,2）Please append a correct "root="boot option; here are the available partitions:1f00 512 mtdblock0 （driver？）1f01 5120 mtdblock1 （driver？）1f02 256512 mtdblock2 （driver？）Kernel panic - not syncing: VFS: Unable tomount root fs on unknown-block（31,2）查看打印信息，确定nandflash设备已经起来，并且已完成分区，排除了存储设备的问题，突然想到内核是不支持yaffs2文件系统的，所以得手动添加，让内核支持yaffs2文件系统。
1. 网上下载yaffs2源码2. 解压，进入源码根目录，执行以下命令; shpatch-ker.sh c /work/s3c6410/kernel/linux-2.6.38.5/ 注：/work/s3c6410/kernel/linux-2.6.38.5/为内核目录3.配置内核，支持yaffs2 Filesystems ---> [*]Miscellaneous filesystems ---> <*> YAFFS2 file system support 另外下面选项也要选上，要不会出不来上面的选项的 <*> Caching block device access to MTDdevices 问题一：编译时出现一下问题：fs/yaffs2/yaffs_fs.c:275: warning:initialization from incompatible pointer typefs/yaffs2/yaffs_fs.c:334: warning:initialization from incompatible pointer typefs/yaffs2/yaffs_fs.c:347: error: unknownfield "delete_inode" specified in initializerfs/yaffs2/yaffs_fs.c:347: warning:initialization from incompatible pointer typefs/yaffs2/yaffs_fs.c:348: error: unknownfield "clear_inode" specified in initializerfs/yaffs2/yaffs_fs.c:348: warning:initialization from incompatible pointer typefs/yaffs2/yaffs_fs.c: In function"yaffs_delete_inode":fs/yaffs2/yaffs_fs.c:563: error: implicitdeclaration of function "clear_inode"fs/yaffs2/yaffs_fs.c: In function"yaffs_write_begin":fs/yaffs2/yaffs_fs.c:748: error: implicitdeclaration of function "__grab_cache_page"fs/yaffs2/yaffs_fs.c:748: warning:assignment makes pointer from integer without a castfs/yaffs2/yaffs_fs.c: In function"yaffs_mknod":fs/yaffs2/yaffs_fs.c:1236: error: "structtask_struct" has no member named "fsuid"fs/yaffs2/yaffs_fs.c:1237: error: "structtask_struct" has no member named "fsgid"fs/yaffs2/yaffs_fs.c: In function"yaffs_symlink":fs/yaffs2/yaffs_fs.c:1416: error: "structtask_struct" has no member named "fsuid"fs/yaffs2/yaffs_fs.c:1417: error: "structtask_struct" has no member named "fsgid"fs/yaffs2/yaffs_fs.c: In function"yaffs_setattr":fs/yaffs2/yaffs_fs.c:1541: error: implicitdeclaration of function "inode_setattr"fs/yaffs2/yaffs_fs.c: In function"yaffs_internal_read_super":fs/yaffs2/yaffs_fs.c:1957: warning: format"%d" expects type "int", but argument 2 has type "uint64_t"fs/yaffs2/yaffs_fs.c:2123: error: implicitdeclaration of function "init_MUTEX" 出现该问题原因：Linux版本与yaffs2版本不兼容，下载新版yaffs2，或者给yaffs2打补丁。