Re: [PATCH v5 1/2] x86_64: remove not needed clear_page for init_level4_page

From: Andrey Ryabinin
Date: Tue Jun 16 2015 - 07:45:20 EST

On 06/16/2015 02:34 PM, Borislav Petkov wrote:
> On Tue, Jun 16, 2015 at 01:16:32PM +0200, Borislav Petkov wrote:
>> Now my hunch is that those entries get overwritten later but I wouldn't
>> want to debug any strange bugs from leftovers in init_level4_pgt so
>> having the clear_page() is actually a good thing.
> So I guess we can do that:
> #ifndef CONFIG_KASAN
> clear_page(init_level4_pgt);
> #endif


Can't we just move clear_page(init_level4_pgt) higher? Before or right after clear_bss() (iow before kasan_early_init()).

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