powerpc/mm: Use pte_user() instead of open coding
We have a common declaration in pte-common.h Add a book3s specific one and switch to pte_user() in callchain.c. In a subsequent patch we will switch _PAGE_USER to _PAGE_PRIVILEGED in the book3s version only. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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