mm: fix vmstat after removing NR_BOUNCE

Hongyu noticed that the nr_unaccepted counter kept growing even in the
absence of unaccepted memory on the machine.

This happens due to a commit that removed NR_BOUNCE: it removed the
counter from the enum zone_stat_item, but left it in the vmstat_text
array.

As a result, all counters below nr_bounce in /proc/vmstat are shifted by
one line, causing the numa_hit counter to be labeled as nr_unaccepted.

To fix this issue, remove nr_bounce from the vmstat_text array.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 194df9f ("mm: remove NR_BOUNCE zone stat")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Reported-by: Hongyu Ning <[email protected]>
Reviewed-by: Jens Axboe <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Hannes Reinecke <[email protected]>
Cc: Johannes Thumshirn <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: kiryl

mm/vmstat.c

@@ -1201,7 +1201,6 @@ const char * const vmstat_text[] = {
 	"nr_zone_unevictable",
 	"nr_zone_write_pending",
 	"nr_mlock",
-	"nr_bounce",
 #if IS_ENABLED(CONFIG_ZSMALLOC)
 	"nr_zspages",
 #endif