1. dependonmajorandminornumber
2. allocations.Devicedriversregisterentriesin/devwhichthen
3. appearautomatically,whichmeansthatthesystemadministratordoes
4. nothavetocreatecharacterandblockspecialdevicefilesinthe
5. /devdirectoryusingthemknodcommand(orMAKEDEVscript)anymore.
7. Thisisworkinprogress.Ifyouwanttousethis,you*must*read
8. thematerialin,especially
9. thefileREADMEthere.
11. Notethatdevfsnolongermanages/dev/pts!IfyouareusingUNIX98
12. ptys,youwillalsoneedtomountthe/dev/ptsfilesystem(devpts).
14. Notethatdevfshasbeenobsoletedbyudev,
15. .
16. Ithasbeenstrippeddowntoabareminimumandisonlyprovidedfor
17. legacyinstallationsthatuseitsnamingschemewhichis
18. unfortunatelydifferentfromthenamesnormalLinuxinstallations
19. use.
21. Ifunsure,sayN.
23. configDEVFS_MOUNT
24. bool"Automaticallymountatboot"
25. dependsonDEVFS_FS
26. help
27. ThisoptionappearsifyouhaveCONFIG_DEVFS_FSenabled.Setting
28. thistoYwillmakethekernelautomaticallymountdevfsonto/dev
29. whenthesystemisbooted,beforetheinitthreadisstarted.
30. Youcanoverridethiswiththe"devfs=nomount"bootoption.
32. Ifunsure,sayN.
34. configDEVFS_DEBUG
35. bool"Debugdevfs"
36. dependsonDEVFS_FS
37. help
38. IfyousayYhere,thenthe/devfilesystemcodewillgenerate
39. debuggingmessages.Seethefile
40. formore
41. details.
43. Ifunsure,sayN.
45. configDEVPTS_FS_XATTR
46. bool"/dev/ptsExtendedAttributes"
47. dependsonUNIX98_PTYS
48. help
49. Extendedattributesarename:valuepairsassociatedwithinodesby
50. thekernelorbyusers(seetheattr(5)manualpage,orvisit
51. fordetails).
53. Ifunsure,sayN.
55. configDEVPTS_FS_SECURITY
56. bool"/dev/ptsSecurityLabels"
57. dependsonDEVPTS_FS_XATTR
58. help
59. Securitylabelssupportalternativeaccesscontrolmodels
60. implementedbysecuritymoduleslikeSELinux.Thisoption
61. enablesanextendedattributehandlerforfilesecurity
62. labelsinthe/dev/ptsfilesystem.
64. Ifyouarenotusingasecuritymodulethatrequiresusing
65. extendedattributesforfilesecuritylabels,sayN.
67. configTMPFS
68. bool"Virtualmemoryfilesystemsupport(formershmfs)"
69. help
70. Tmpfsisafilesystemwhichkeepsallfilesinvirtualmemory.
72. Everythingintmpfsistemporaryinthesensethatnofileswillbe
73. createdonyourharddrive.Thefilesliveinmemoryandswap
74. space.Ifyouunmountatmpfsinstance,everythingstoredthereinis
75. lost.
77. Seefordetails.

7.内核裁剪

7.1内核配置文件

将arch/arm/configs/s3c2410_defconfig .config拷到内核目录树根下：
cp arch/arm/configs/s3c2410_defconfig .config
make menuconfig 将s3c2410_defconfig 导入，在s3c2410_defconfig基础上，裁剪内核。

7.2内核选项

Loadable module support >
[*] Enable loadable module support
[*] Automatic kernel module loading

System Type >
[*] S3C2410 DMA support

Floating point emulation >
[*] NWFPE math emulation

接下来要做的是对内核MTD子系统的设置

Device Drivers >
Memory Technology Devices (MTD) >
[*] MTD partitioning support /*支持MTD分区，这样我们在前面设置的分区才有意义*/
[*] Command line partition table parsing /*支持从命令行设置flash分区信息，灵活*/
RAM/ROM/Flash chip drivers >
<*> Detect flash chips by Common Flash Interface (CFI) probe
<*> Detect nonCFI AMD/JEDECcompatible flash chips
<*> Support for Intel/Sharp flash chips
<*> Support for AMD/Fujitsu flash chips
<*> Support for ROM chips in bus mapping
NAND Flash Device Drivers >
<*> NAND Device Support
<*> NAND Flash support for S3C2410/S3C2440 SoC
Character devices >
[*] Nonstandard serial port support
[*] S3C2410 RTC Driver

接下来做的是针对文件系统的设置

File systems >
<> Second extended fs support #去除对ext2的支持
Pseudo filesystems >
[*] /proc file system support
[*] Virtual memory file system support (former shm fs)
[*] /dev file system support (OBSOLETE)
[*] Automatically mount at boot (NEW)
这里会看到我们前先修改fs/Kconfig的成果，devfs已经被支持上了
Miscellaneous filesystems >
Network File Systems >
<*> NFS file system support

7.3编译

make即