[RFC][PATCH 09/10] x86/mm/cpa: Better use clflushopt

Currently we issue an MFENCE before and after flushing a range. This means that if we flush a bunch of single page ranges -- like with the cpa array, we issue a whole bunch of superfluous MFENCEs. Reorgainze the code a little to avoid this. Signed-off-by: Peter Zijlstra (Intel) ---

[RFC][PATCH 09/10] x86/mm/cpa: Better use clflushopt

Currently we issue an MFENCE before and after flushing a range. This means that if we flush a bunch of single page ranges -- like with the cpa array, we issue a whole bunch of superfluous MFENCEs. Reorgainze the code a little to avoid this. Signed-off-by: Peter Zijlstra (Intel) ---