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Date:   Fri, 24 Nov 2017 20:46:37 +1100 (AEDT)
From:   Michael Ellerman <>
To:     Christophe Leroy <>,
        Benjamin Herrenschmidt <>,
        Paul Mackerras <>,
        Scott Wood <>, Meelis Roos <>,
        Balbir Singh <>
Subject: Re: [v2] powerpc: fix boot on BOOK3S_32 with CONFIG_STRICT_KERNEL_RWX

On Tue, 2017-11-21 at 14:28:20 UTC, Christophe Leroy wrote:
> On powerpc32, patch_instruction() is called by apply_feature_fixups()
> which is called from early_init()
> There is the following note in front of early_init():
>  * Note that the kernel may be running at an address which is different
>  * from the address that it was linked at, so we must use RELOC/PTRRELOC
>  * to access static data (including strings).  -- paulus
> Therefore, slab_is_available() cannot be called yet, and
> text_poke_area must be addressed with PTRRELOC()
> Fixes: 37bc3e5fd764f ("powerpc/lib/code-patching: Use alternate map
> for patch_instruction()")
> Reported-by: Meelis Roos <>
> Cc: Balbir Singh <>
> Signed-off-by: Christophe Leroy <>

Applied to powerpc fixes, thanks.


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