agp: don't lock pages

AGP should not need to lock pages. They are not protecting any race
because there is no lock_page calls, only SetPageLocked.

This is causing hangs with d00806b183152af6d24f46f0c33f14162ca1262a.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 0 insertions, 5 deletions

diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index d535c406b319..3db4f4076ed4 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -1170,7 +1170,6 @@ void *agp_generic_alloc_page(struct agp_bridge_data *bridge)
         map_page_into_agp(page);
 
         get_page(page);
-        SetPageLocked(page);
         atomic_inc(&agp_bridge->current_memory_agp);
         return page_address(page);
 }
@@ -1187,7 +1186,6 @@ void agp_generic_destroy_page(void *addr)
         page = virt_to_page(addr);
         unmap_page_from_agp(page);
         put_page(page);
-        unlock_page(page);
         free_page((unsigned long)addr);
         atomic_dec(&agp_bridge->current_memory_agp);
 }
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index a1240603912c..2f319f474f70 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -213,7 +213,6 @@ static void *i8xx_alloc_pages(void)
         }
         global_flush_tlb();
         get_page(page);
-        SetPageLocked(page);
         atomic_inc(&agp_bridge->current_memory_agp);
         return page_address(page);
 }
@@ -229,7 +228,6 @@ static void i8xx_destroy_pages(void *addr)
         change_page_attr(page, 4, PAGE_KERNEL);
         global_flush_tlb();
         put_page(page);
-        unlock_page(page);
         __free_pages(page, 2);
         atomic_dec(&agp_bridge->current_memory_agp);
 }
diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c
index cda608c42bea..98cf8abb3e57 100644
--- a/drivers/char/agp/sgi-agp.c
+++ b/drivers/char/agp/sgi-agp.c
@@ -51,7 +51,6 @@ static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
                 return NULL;
 
         get_page(page);
-        SetPageLocked(page);
         atomic_inc(&agp_bridge->current_memory_agp);
         return page_address(page);
 }