From: Oscar Salvador <osalvador@techadventures.net>
To: linux-mm@kvack.org
Cc: mhocko@kernel.org, mgorman@techsingularity.net, vbabka@suse.cz
Subject: [PATCH v1] mm: make alloc_node_mem_map a voidcall if we don't have CONFIG_FLAT_NODE_MEM_MAP
Date: Tue, 14 Nov 2017 12:19:35 +0100 [thread overview]
Message-ID: <20171114111935.GA11758@techadventures.net> (raw)
free_area_init_node() calls alloc_node_mem_map(), but this function
does nothing unless we have CONFIG_FLAT_NODE_MEM_MAP.
As a cleanup, we can move the "#ifdef CONFIG_FLAT_NODE_MEM_MAP" within
alloc_node_mem_map() out of the function, and define a
alloc_node_mem_map() { } when CONFIG_FLAT_NODE_MEM_MAP is not present.
This also moves the printk, that lays within the "#ifdef CONFIG_FLAT_NODE_MEM_MAP" block,
from free_area_init_node() to alloc_node_mem_map(), getting rid of the
"#ifdef CONFIG_FLAT_NODE_MEM_MAP" in free_area_init_node().
Signed-off-by: Oscar Salvador <osalvador@techadventures.net>
---
mm/page_alloc.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 77e4d3c5c57b..56400b5d3183 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6126,6 +6126,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
}
}
+#ifdef CONFIG_FLAT_NODE_MEM_MAP
static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
{
unsigned long __maybe_unused start = 0;
@@ -6135,7 +6136,6 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
if (!pgdat->node_spanned_pages)
return;
-#ifdef CONFIG_FLAT_NODE_MEM_MAP
start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1);
offset = pgdat->node_start_pfn - start;
/* ia64 gets its own node_mem_map, before this, without bootmem */
@@ -6157,6 +6157,9 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
pgdat->node_id);
pgdat->node_mem_map = map + offset;
}
+ printk(KERN_DEBUG "alloc_node_mem_map: node %d, pgdat %08lx, node_mem_map %08lx\n",
+ pgdat->node_id, (unsigned long)pgdat,
+ (unsigned long)pgdat->node_mem_map);
#ifndef CONFIG_NEED_MULTIPLE_NODES
/*
* With no DISCONTIG, the global mem_map is just set as node 0's
@@ -6169,8 +6172,10 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
}
#endif
-#endif /* CONFIG_FLAT_NODE_MEM_MAP */
}
+#else
+static void __ref alloc_node_mem_map(struct pglist_data *pgdat) { }
+#endif /* CONFIG_FLAT_NODE_MEM_MAP */
void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
unsigned long node_start_pfn, unsigned long *zholes_size)
@@ -6197,11 +6202,6 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
zones_size, zholes_size);
alloc_node_mem_map(pgdat);
-#ifdef CONFIG_FLAT_NODE_MEM_MAP
- printk(KERN_DEBUG "free_area_init_node: node %d, pgdat %08lx, node_mem_map %08lx\n",
- nid, (unsigned long)pgdat,
- (unsigned long)pgdat->node_mem_map);
-#endif
reset_deferred_meminit(pgdat);
free_area_init_core(pgdat);
--
2.13.5
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2017-11-14 11:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-14 11:19 Oscar Salvador [this message]
2017-11-14 11:53 ` [PATCH v1] mm: make alloc_node_mem_map a voidcall if we don't have CONFIG_FLAT_NODE_MEM_MAP Michal Hocko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171114111935.GA11758@techadventures.net \
--to=osalvador@techadventures.net \
--cc=linux-mm@kvack.org \
--cc=mgorman@techsingularity.net \
--cc=mhocko@kernel.org \
--cc=vbabka@suse.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).