Messages in this thread | | | Date | Tue, 19 Oct 1999 11:21:50 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: access_ok inside kernelspace |
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On Tue, 19 Oct 1999, Matthew Wilcox wrote:
> On Tue, Oct 19, 1999 at 09:18:40AM +0200, Ingo Molnar wrote: > > it's a bug, system calls really should work from within system calls. > > Ugh, really? It's going to slow down Linux/PA-RISC's syscall handler if > we have to check whether we're already in kernel mode. What's wrong with > calling sys_sysfs()?
... provided you are using/setting set_fs()/get_fs() properly. You'll obviously not go through the system call handler but call sys_open() or whatever directly from within kernel space.
-- mingo
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