allocating user-memory from kernel: do i use GFP_USER

[Luke Kenneth Casson Leighton]

hi, it occurred to me that instead of cut/paste all the sys_* functions
in fs/*.c for this proxyfs kernel module i am doing that i could
instead, if i could get hold of some user memory, call the sys_*
functions directly.

can i just do this:

	char __user *filename = kmalloc(strlen(kfilename)+1, GFP_USER);

and then this:

	sys_rename(filename, ...);

and expect it to work?

ta,

l.

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