mm: delete stale comment about cachelines

These comments have been wrong since commit a211c6550efc ("mm: page_alloc:
defrag_mode kswapd/kcompactd watermarks") added NR_FREE_PAGES_BLOCKS.
Since nobody has complained about it in the last year, it seems unlikely
these comments were particularly useful anyway, so delete them.

Link: https://lore.kernel.org/20260601-zone_stat_item-comment-v1-1-f452dd91d5eb@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 8e449f524f266a8ca95d39a6ffc641bde4b7f07c..ca27121871475c1de282e640b8ae3e02046f86ec 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -214,7 +214,6 @@ enum numa_stat_item {
 #endif
 
 enum zone_stat_item {
-       /* First 128 byte cacheline (assuming 64 bit words) */
        NR_FREE_PAGES,
        NR_FREE_PAGES_BLOCKS,
        NR_ZONE_LRU_BASE, /* Used only for compaction and reclaim retry */
@@ -225,7 +224,6 @@ enum zone_stat_item {
        NR_ZONE_UNEVICTABLE,
        NR_ZONE_WRITE_PENDING,  /* Count of dirty, writeback and unstable pages */
        NR_MLOCK,               /* mlock()ed pages found and moved off LRU */
-       /* Second 128 byte cacheline */
 #if IS_ENABLED(CONFIG_ZSMALLOC)
        NR_ZSPAGES,             /* allocated in zsmalloc */
 #endif