Benjamin Gray 3f5ded2469 powerpc/64s: Fix __pte_needs_flush() false positive warning ... commit 1abce0580b upstream. Userspace PROT_NONE ptes set _PAGE_PRIVILEGED, triggering a false positive debug assertion that __pte_flags_need_flush() is not called on a kernel mapping. Detect when it is a userspace PROT_NONE page by checking the required bits of PAGE_NONE are set, and none of the RWX bits are set. pte_protnone() is insufficient here because it always returns 0 when CONFIG_NUMA_BALANCING=n. Fixes: b11931e9ad ("powerpc/64s: add pte_needs_flush and huge_pmd_needs_flush") Cc: stable@vger.kernel.org # v6.1+ Reported-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230302225947.81083-1-bgray@linux.ibm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-04-06 12:10:54 +02:00
..
32	…
64	powerpc/64s: Fix __pte_needs_flush() false positive warning	2023-04-06 12:10:54 +02:00
pgalloc.h	…
pgtable.h	…
tlbflush.h	…