powerpc/64s/radix: Fix build failure with RADIX_MMU=n
After merging the powerpc tree, today's linux-next build (powerpc64 allnoconfig) failed like this: arch/powerpc/mm/book3s64/pgtable.c:216:3: error: implicit declaration of function 'radix__flush_all_lpid_guest' radix__flush_all_lpid_guest() is only declared for CONFIG_PPC_RADIX_MMU which is not set for this build. Fix it by adding an empty version for the RADIX_MMU=n case, which should never be called. Fixes: 99161de3 ("powerpc/64s/radix: tidy up TLB flushing code") Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> [mpe: Munge change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190930101342.36c1afa0@canb.auug.org.au
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