模块中编写文件操作失败，请求高手解答！

eveson

另外我觉得最好不让把这宗操作放在init中，可以放在其他的函数里，如read write里。

kns1024wh

你看看这个
do_sync_writeDefined as a function in:

• fs/read_write.c, line 272

Defined as a function prototype in:

• include/linux/fs.h, line 1873

Referenced (in 42 files total) in:

• arch/s390/hypfs/inode.c, line 466
• fs/pipe.c:
  • line 798
  • line 811
• fs/minix/file.c, line 22
• fs/ramfs/file-nommu.c, line 42
• fs/ramfs/file-mmu.c, line 43
• fs/reiserfs/file.c, line 281
• fs/ocfs2/file.c, line 2242
• fs/jfs/file.c, line 106
• fs/affs/file.c, line 32
• fs/fuse/dev.c, line 1081
• fs/fuse/file.c, line 1472
• fs/hpfs/file.c, line 124
• fs/smbfs/file.c, line 439
• fs/bfs/file.c, line 29
• fs/udf/file.c, line 209
• fs/hostfs/hostfs_kern.c, line 423
• fs/ufs/file.c, line 61
• fs/ext3/file.c, line 112
• fs/gfs2/ops_file.c:
  • line 741
  • line 769
• fs/nfs/file.c, line 64
• fs/fat/file.c, line 144
• fs/block_dev.c, line 1173
• fs/omfs/file.c, line 343
• fs/read_write.c:
  • line 272
  • line 295
  • line 314
• fs/ext4/file.c, line 146
• fs/afs/file.c, line 31
• fs/adfs/file.c, line 34
• fs/cifs/cifsfs.c:
  • line 681
  • line 722
• fs/sysv/file.c, line 26
• fs/jffs2/file.c, line 47
• fs/hfs/inode.c, line 606
• fs/qnx4/file.c, line 30
• fs/syaoran_2.6.c, line 271
• fs/xfs/linux-2.6/xfs_file.c:
  • line 438
  • line 459
• fs/hfsplus/inode.c, line 292
• fs/ubifs/file.c, line 1279
• fs/ext2/file.c, line 48
• fs/ecryptfs/file.c, line 325
• include/linux/fs.h, line 1873
• drivers/net/tun.c, line 1100
• drivers/char/raw.c, line 247
• mm/shmem.c, line 2396

pigcrying

问题正如 new_learner 所说，出在set_fs()函数，正确的应该是set_fs(KERNEL_DS),或者set_fs(get_ds())。
重新编译加载后正常执行。Thanks all of u!