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Date:   Wed, 13 Jun 2018 16:58:55 +0300
From:   Dan Carpenter <>
To:     Josh Poimboeuf <>
        Peter Zijlstra <>,
        "Gustavo A. R. Silva" <>
Subject: Re: Smatch check for Spectre stuff

On Wed, Jun 13, 2018 at 04:10:49PM +0300, Dan Carpenter wrote:
> Also it turns out that mem_section[] is declared in mm/sparse.c and
> Smatch is supposed to be able to figure out the size of it but
> apparently there is a bug...  :(  I'll take a look at that.

Oh.  I have CONFIG_SPARSEMEM_EXTREME enabled so the size ends up
depending on cpu_feature_enabled(X86_FEATURE_LA57) which is tricky.
Meaning that I can detect that everything higher than 127 is masked off
but it doesn't help me since I don't know that the array has 128

dan carpenter

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