On Wed, May 15, 2019 at 06:40:47AM +0000, Christophe Leroy wrote:
[Backport of upstream commit b45ba4a51cde29b2939365ef0c07ad34c8321789]
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 init_mem_is_free must be accessed with PTRRELOC()
Fixes: 1c38a84d4586 ("powerpc: Avoid code patching freed init sections") Link: https://bugzilla.kernel.org/show_bug.cgi?id=203597 Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr
Can't apply the upstream commit as such due to several other unrelated stuff like for instance STRICT_KERNEL_RWX which are missing. So instead, using same approach as for commit 252eb55816a6f69ef9464cad303cdb3326cdc61d
Now queued up, thanks.
greg k-h