arch, mm: filter disallowed nodes from arch specific show_mem functions

Architectures that implement their own show_mem() function did not pass
the filter argument to show_free_areas() to appropriately avoid emitting
the state of nodes that are disallowed in the current context.  This patch
now passes the filter argument to show_free_areas() so those nodes are now
avoided.

This patch also removes the show_free_areas() wrapper around
__show_free_areas() and converts existing callers to pass an empty filter.

ia64 emits additional information for each node, so skip_free_areas_zone()
must be made global to filter disallowed nodes and it is converted to use
a nid argument rather than a zone for this use case.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: James Bottomley <jejb@parisc-linux.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 12 insertions, 8 deletions

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 9a018cde5d84..f114a3b14c6a 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -44,13 +44,16 @@ void show_mem(unsigned int filter)
 	pg_data_t *pgdat;
 
 	printk(KERN_INFO "Mem-info:\n");
-	show_free_areas();
+	show_free_areas(filter);
 	printk(KERN_INFO "Node memory in pages:\n");
 	for_each_online_pgdat(pgdat) {
 		unsigned long present;
 		unsigned long flags;
 		int shared = 0, cached = 0, reserved = 0;
+		int nid = pgdat->node_id;
 
+		if (skip_free_areas_node(filter, nid))
+			continue;
 		pgdat_resize_lock(pgdat, &flags);
 		present = pgdat->node_present_pages;
 		for(i = 0; i < pgdat->node_spanned_pages; i++) {
@@ -64,8 +67,7 @@ void show_mem(unsigned int filter)
 				if (max_gap < LARGE_GAP)
 					continue;
 #endif
-				i = vmemmap_find_next_valid_pfn(pgdat->node_id,
-					 i) - 1;
+				i = vmemmap_find_next_valid_pfn(nid, i) - 1;
 				continue;
 			}
 			if (PageReserved(page))
@@ -81,7 +83,7 @@ void show_mem(unsigned int filter)
 		total_cached += cached;
 		total_shared += shared;
 		printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, "
-		       "shrd: %10d, swpd: %10d\n", pgdat->node_id,
+		       "shrd: %10d, swpd: %10d\n", nid,
 		       present, reserved, shared, cached);
 	}
 	printk(KERN_INFO "%ld pages of RAM\n", total_present);
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 82ab1bc6afb1..c641333cd997 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -622,13 +622,16 @@ void show_mem(unsigned int filter)
 	pg_data_t *pgdat;
 
 	printk(KERN_INFO "Mem-info:\n");
-	show_free_areas();
+	show_free_areas(filter);
 	printk(KERN_INFO "Node memory in pages:\n");
 	for_each_online_pgdat(pgdat) {
 		unsigned long present;
 		unsigned long flags;
 		int shared = 0, cached = 0, reserved = 0;
+		int nid = pgdat->node_id;
 
+		if (skip_free_areas_node(filter, nid))
+			continue;
 		pgdat_resize_lock(pgdat, &flags);
 		present = pgdat->node_present_pages;
 		for(i = 0; i < pgdat->node_spanned_pages; i++) {
@@ -638,8 +641,7 @@ void show_mem(unsigned int filter)
 			if (pfn_valid(pgdat->node_start_pfn + i))
 				page = pfn_to_page(pgdat->node_start_pfn + i);
 			else {
-				i = vmemmap_find_next_valid_pfn(pgdat->node_id,
-					 i) - 1;
+				i = vmemmap_find_next_valid_pfn(nid, i) - 1;
 				continue;
 			}
 			if (PageReserved(page))
@@ -655,7 +657,7 @@ void show_mem(unsigned int filter)
 		total_cached += cached;
 		total_shared += shared;
 		printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, "
-		       "shrd: %10d, swpd: %10d\n", pgdat->node_id,
+		       "shrd: %10d, swpd: %10d\n", nid,
 		       present, reserved, shared, cached);
 	}
 	printk(KERN_INFO "%ld pages of RAM\n", total_present);