Subject: [PATCH RFC 1/7] agp: efficeon: no need to set PG_reserved on GATT tables

From: David Hildenbrand <[email-masked]>
Date: Wed, 5 Dec 2018 13:28:45 +0100

The l1 GATT page table is kept in a special on-chip page with 64 entries.
We allocate the l2 page table pages via get_zeroed_page() and enter them
into the table. These l2 pages are modified accordingly when
inserting/removing memory via efficeon_insert_memory and
efficeon_remove_memory.

Apart from that, these pages are not exposed or ioremap'ed. We can stop
setting them reserved (propably copied from generic code).

Cc: David Airlie <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Greg Kroah-Hartman <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Cc: Michal Hocko <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Signed-off-by: David Hildenbrand <[email-masked]>
---
 drivers/char/agp/efficeon-agp.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index 7f88490b5479..c53f0f9ef5b0 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -163,7 +163,6 @@ static int efficeon_free_gatt_table(struct agp_bridge_data *bridge)
 		unsigned long page = efficeon_private.l1_table[index];
 		if (page) {
 			efficeon_private.l1_table[index] = 0;
-			ClearPageReserved(virt_to_page((char *)page));
 			free_page(page);
 			freed++;
 		}
@@ -219,7 +218,6 @@ static int efficeon_create_gatt_table(struct agp_bridge_data *bridge)
 			efficeon_free_gatt_table(agp_bridge);
 			return -ENOMEM;
 		}
-		SetPageReserved(virt_to_page((char *)page));
 
 		for (offset = 0; offset < PAGE_SIZE; offset += clflush_chunk)
 			clflush((char *)page+offset);
-- 
2.17.2