sparc64: kill page table quicklists

With the recent mmu_gather changes that included generic RCU freeing of
page-tables, it is now quite straightforward to implement gup_fast() on
sparc64.

This patch:

Remove the page table quicklists.  They are pointless and make it harder
to use RCU page table freeing and share code with other architectures.

BTW, this is the second time this has happened, see commit 3c936465249f
("[SPARC64]: Kill pgtable quicklists and use SLAB.")

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index a5f51b22fcbe..536412d8f416 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -236,6 +236,8 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsign
         }
 }
 
+struct kmem_cache *pgtable_cache __read_mostly;
+
 static struct kmem_cache *tsb_caches[8] __read_mostly;
 
 static const char *tsb_cache_names[8] = {
@@ -253,6 +255,15 @@ void __init pgtable_cache_init(void)
 {
         unsigned long i;
 
+        pgtable_cache = kmem_cache_create("pgtable_cache",
+                                          PAGE_SIZE, PAGE_SIZE,
+                                          0,
+                                          _clear_page);
+        if (!pgtable_cache) {
+                prom_printf("pgtable_cache_init(): Could not create!\n");
+                prom_halt();
+        }
+
         for (i = 0; i < 8; i++) {
                 unsigned long size = 8192 << i;
                 const char *name = tsb_cache_names[i];