Re: [PATCH 1/3] powerpc/code-patching: work around code patching verification in patching tests

Excerpts from Christophe Leroy's message of November 26, 2021 4:34 pm:

Le 26/11/2021 à 04:22, Nicholas Piggin a écrit :

quoted

Code patching tests patch the stack and (non-module) vmalloc space now,
which falls afoul of the new address check.

The stack patching can easily be fixed, but the vmalloc patching is more
difficult. For now, add an ugly workaround to skip the check while the
test code is running.

This really looks hacky.

To skip the test, you can call do_patch_instruction() instead of calling 
patch_instruction().

And make a do_patch_branch function. I thought about it, and thought 
this is sligtly easier.

Thanks,
Nick