remove dead code in pgtable_cache_init

The conversion from using a slab cache to quicklist left some residual
dead code.

I note that in the conversion it now always allocates a whole page for
the pgd, rather than the 32 bytes needed for a PAE pgd.  Was this
intended?

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 5 insertions, 17 deletions

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 730a5b177b1f..aa4708fda3e2 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -746,24 +746,12 @@ struct kmem_cache *pmd_cache;
 
 void __init pgtable_cache_init(void)
 {
-        size_t pgd_size = PTRS_PER_PGD*sizeof(pgd_t);
-
-        if (PTRS_PER_PMD > 1) {
+        if (PTRS_PER_PMD > 1)
                 pmd_cache = kmem_cache_create("pmd",
-                                        PTRS_PER_PMD*sizeof(pmd_t),
-                                        PTRS_PER_PMD*sizeof(pmd_t),
-                                        SLAB_PANIC,
-                                        pmd_ctor);
-                if (!SHARED_KERNEL_PMD) {
-                        /* If we're in PAE mode and have a non-shared
-                           kernel pmd, then the pgd size must be a
-                           page size.  This is because the pgd_list
-                           links through the page structure, so there
-                           can only be one pgd per page for this to
-                           work. */
-                        pgd_size = PAGE_SIZE;
-                }
-        }
+                                              PTRS_PER_PMD*sizeof(pmd_t),
+                                              PTRS_PER_PMD*sizeof(pmd_t),
+                                              SLAB_PANIC,
+                                              pmd_ctor);
 }
 
 /*