[PATCH v1 1/9] agp: efficeon: no need to set PG_reserved on GATT tables

David Hildenbrand
2018-12-14T11:10:06Z

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 <airlied@linux.ie>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
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);