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

On Thu, Jul 16, 2020 at 06:49:09PM +0200, Christophe Leroy wrote:

Jarkko Sakkinen [off-list ref] a écrit :

quoted

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/ (local)

I.e. not intruding PPC anymore :-)

/Jarkko