2 files changed, 4 insertions, 31 deletions

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 43e3aa3b0573..64e9943ea4f0 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -398,7 +398,8 @@ ENDPROC(__enable_mmu)
  * other registers depend on the function called upon completion
  */
         .align  5
-__turn_mmu_on:
+        .pushsection    .idmap.text, "ax"
+ENTRY(__turn_mmu_on)
         mov     r0, r0
         mcr     p15, 0, r0, c1, c0, 0           @ write control reg
         mrc     p15, 0, r3, c0, c0, 0           @ read id reg
@@ -407,6 +408,7 @@ __turn_mmu_on:
         mov     pc, r3
 __turn_mmu_on_end:
 ENDPROC(__turn_mmu_on)
+        .popsection
 
 
 #ifdef CONFIG_SMP_ON_UP
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 8afadda37459..76ff28d87bf3 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -62,7 +62,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
 {
         struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
         struct task_struct *idle = ci->idle;
-        pgd_t *pgd;
         int ret;
 
         /*
@@ -85,29 +84,11 @@ int __cpuinit __cpu_up(unsigned int cpu)
         }
 
         /*
-         * Allocate initial page tables to allow the new CPU to
-         * enable the MMU safely.  This essentially means a set
-         * of our "standard" page tables, with the addition of
-         * a 1:1 mapping for the physical address of the kernel.
-         */
-        pgd = pgd_alloc(&init_mm);
-        if (!pgd)
-                return -ENOMEM;
-
-        if (PHYS_OFFSET != PAGE_OFFSET) {
-#ifndef CONFIG_HOTPLUG_CPU
-                identity_mapping_add(pgd, __pa(__init_begin), __pa(__init_end));
-#endif
-                identity_mapping_add(pgd, __pa(_stext), __pa(_etext));
-                identity_mapping_add(pgd, __pa(_sdata), __pa(_edata));
-        }
-
-        /*
          * We need to tell the secondary core where to find
          * its stack and the page tables.
          */
         secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
-        secondary_data.pgdir = virt_to_phys(pgd);
+        secondary_data.pgdir = virt_to_phys(idmap_pgd);
         secondary_data.swapper_pg_dir = virt_to_phys(swapper_pg_dir);
         __cpuc_flush_dcache_area(&secondary_data, sizeof(secondary_data));
         outer_clean_range(__pa(&secondary_data), __pa(&secondary_data + 1));
@@ -143,16 +124,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
         secondary_data.stack = NULL;
         secondary_data.pgdir = 0;
 
-        if (PHYS_OFFSET != PAGE_OFFSET) {
-#ifndef CONFIG_HOTPLUG_CPU
-                identity_mapping_del(pgd, __pa(__init_begin), __pa(__init_end));
-#endif
-                identity_mapping_del(pgd, __pa(_stext), __pa(_etext));
-                identity_mapping_del(pgd, __pa(_sdata), __pa(_edata));
-        }
-
-        pgd_free(&init_mm, pgd);
-
         return ret;
 }