ARM: pgtable: collect up identity mapping functions

We have two places where we create identity mappings - one when we bring
secondary CPUs online, and one where we setup some mappings for soft-
reboot.  Combine these two into a single implementation.  Also collect
the identity mapping deletion function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 0 insertions, 35 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 94ee0930d690..bd1a11e62f4e 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1045,38 +1045,3 @@ void __init paging_init(struct machine_desc *mdesc)
         empty_zero_page = virt_to_page(zero_page);
         __flush_dcache_page(NULL, empty_zero_page);
 }
-
-/*
- * In order to soft-boot, we need to insert a 1:1 mapping in place of
- * the user-mode pages.  This will then ensure that we have predictable
- * results when turning the mmu off
- */
-void setup_mm_for_reboot(char mode)
-{
-        unsigned long base_pmdval;
-        pgd_t *pgd;
-        int i;
-
-        /*
-         * We need to access to user-mode page tables here. For kernel threads
-         * we don't have any user-mode mappings so we use the context that we
-         * "borrowed".
-         */
-        pgd = current->active_mm->pgd;
-
-        base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT;
-        if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
-                base_pmdval |= PMD_BIT4;
-
-        for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) {
-                unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval;
-                pmd_t *pmd;
-
-                pmd = pmd_off(pgd, i << PGDIR_SHIFT);
-                pmd[0] = __pmd(pmdval);
-                pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));
-                flush_pmd_entry(pmd);
-        }
-
-        local_flush_tlb_all();
-}