About the system call named "sys_mount".

[Russell King - ARM Linux]

On Mon, Oct 19, 2009 at 05:57:21PM +0800, 付新荣 wrote:
> if there is no potential risk, the speed of "mount" command would be
> improved greatly.  Tell me plz if there is problem. thax.

1. You're risking a kernel oops, caused by direct dereferencing of
   user pointers
2. The cost of copying parameters in sys_mount has nothing to do with
   the speed - the biggest issue will be accessing the media itself.