Merge remote-tracking branch 'regmap/for-next'

[karo-tx-linux.git] / arch / arm64 / kernel / suspend.c

diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c
index 1095aa483a1c28e5387b23895c14d7a1746268a3..66055392f445ef47a7fb3749ca6024df1ea185c9 100644 (file)
--- a/arch/arm64/kernel/suspend.c
+++ b/arch/arm64/kernel/suspend.c
@@ -60,7 +60,6 @@ void __init cpu_suspend_set_dbg_restorer(void (*hw_bp_restore)(void *))
  */
 int cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
 {
-       struct mm_struct *mm = current->active_mm;
        int ret;
        unsigned long flags;
 
@@ -87,22 +86,11 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
        ret = __cpu_suspend_enter(arg, fn);
        if (ret == 0) {
                /*
-                * We are resuming from reset with TTBR0_EL1 set to the
-                * idmap to enable the MMU; set the TTBR0 to the reserved
-                * page tables to prevent speculative TLB allocations, flush
-                * the local tlb and set the default tcr_el1.t0sz so that
-                * the TTBR0 address space set-up is properly restored.
-                * If the current active_mm != &init_mm we entered cpu_suspend
-                * with mappings in TTBR0 that must be restored, so we switch
-                * them back to complete the address space configuration
-                * restoration before returning.
+                * We are resuming from reset with the idmap active in TTBR0_EL1.
+                * We must uninstall the idmap and restore the expected MMU
+                * state before we can possibly return to userspace.
                 */
-               cpu_set_reserved_ttbr0();
-               local_flush_tlb_all();
-               cpu_set_default_tcr_t0sz();
-
-               if (mm != &init_mm)
-                       cpu_switch_mm(mm->pgd, mm);
+               cpu_uninstall_idmap();
 
                /*
                 * Restore per-cpu offset before any kernel