Re: [PATCH v2 1/3] module: Rename module_alloc() to text_alloc() and move to kernel proper

From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
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Subject: Re: [PATCH v2 1/3] module: Rename module_alloc() to text_alloc() and move to kernel proper
Date: Thu, 23 Jul 2020 04:51:27 +0300	[thread overview]
Message-ID: <20200723015127.GE45081@linux.intel.com> (raw)
In-Reply-To: <20200716184909.Horde.JVRLLcKix_jhrJfiQYRbbQ1@messagerie.si.c-s.fr>

On Thu, Jul 16, 2020 at 06:49:09PM +0200, Christophe Leroy wrote:
> Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> a écrit :
> 
> > Rename module_alloc() to text_alloc() and module_memfree() to
> > text_memfree(), and move them to kernel/text.c, which is unconditionally
> > compiled to the kernel proper. This allows kprobes, ftrace and bpf to
> > allocate space for executable code without requiring to compile the modules
> > support (CONFIG_MODULES=y) in.
> 
> You are not changing enough in powerpc to have this work.
> On powerpc 32 bits (6xx), when STRICT_KERNEL_RWX is selected, the vmalloc
> space is set to NX (no exec) at segment level (ie by 256Mbytes zone) unless
> CONFIG_MODULES is selected.
> 
> Christophe

This has been deduced down to:

https://lore.kernel.org/lkml/20200717030422.679972-1-jarkko.sakkinen@linux.intel.com/

I.e. not intruding PPC anymore :-)

/Jarkko

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