[PATCH AUTOSEL for 4.9 144/190] mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo

From: David Rientjes [ Upstream commit 7dfb8bf3b9caef4049bee51d2c22e1c3a311d483 ] After "mm, vmstat: print non-populated zones in zoneinfo", /proc/zoneinfo will show unpopulated zones. The per-cpu pageset statistics are not relevant for unpopulated zones and can be

[PATCH AUTOSEL for 4.9 144/190] mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo

From: David Rientjes [ Upstream commit 7dfb8bf3b9caef4049bee51d2c22e1c3a311d483 ] After "mm, vmstat: print non-populated zones in zoneinfo", /proc/zoneinfo will show unpopulated zones. The per-cpu pageset statistics are not relevant for unpopulated zones and can be potentially lengthy, so