From 618b8c20d03c9ea06711bd36d906322ba35c0add Mon Sep 17 00:00:00 2001 From: Nikolay Borisov <nborisov@suse.com> Date: Mon, 10 Jul 2017 15:49:32 -0700 Subject: [PATCH] include/linux/mmzone.h: remove ancient/ambiguous comment Currently pg_data_t is just a struct which describes a NUMA node memory layout. Let's keep the comment simple and remove ambiguity. Link: http://lkml.kernel.org/r/1498220534-22717-1-git-send-email-nborisov@suse.com Signed-off-by: Nikolay Borisov <nborisov@suse.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- include/linux/mmzone.h | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 7e8f100cb56d3..16532fa0bb64c 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -603,12 +603,9 @@ extern struct page *mem_map; #endif /* - * The pg_data_t structure is used in machines with CONFIG_DISCONTIGMEM - * (mostly NUMA machines?) to denote a higher-level memory zone than the - * zone denotes. - * * On NUMA machines, each NUMA node would have a pg_data_t to describe - * it's memory layout. + * it's memory layout. On UMA machines there is a single pglist_data which + * describes the whole memory. * * Memory statistics and page replacement data structures are maintained on a * per-zone basis. -- GitLab