Re: [PATCH v5] RO/NX protection for loadable kernel modules

[H. Peter Anvin]

Rusty Russell wrote:
> 
> OTOH, a quick grep shows currently only cris does kmalloc, and that's a config 
> option.
> 
> It might be time to unify this code.  If we rename MODULE_START to 
> MODULE_VADDR on MIPS, then ignoring CRIS there's only two real variants; 
> vmalloc and __vmalloc.
> 
> (I like the idea of trying kmalloc and falling back, simply because it reduces 
> TLB pressure, but that's probably best done after unification).
> 

Instead of plain kmalloc we could also have separate R-- and R-X slabs
(the normal kmalloc slabs already being RW-).

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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