powerpc/32s: Don't flush all TLBs when flushing one page
When flushing any memory range, the flushing function flushes all TLBs. When (start) and (end - 1) are in the same memory page, flush that page instead. Signed-off-by:Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by:
Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/b30b2eae6960502eaf0d9e36c60820b839693c33.1580542939.git.christophe.leroy@c-s.fr
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