[S390] More cleanup for struct _lowcore

Remove cpu_id from lowcore and replace addr_t with __u64.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

4 files changed, 29 insertions, 33 deletions

diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index a09408952ed0..32b1ede69858 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -126,7 +126,6 @@ int main(void)
         DEFINE(__LC_KERNEL_ASCE, offsetof(struct _lowcore, kernel_asce));
         DEFINE(__LC_USER_ASCE, offsetof(struct _lowcore, user_asce));
         DEFINE(__LC_USER_EXEC_ASCE, offsetof(struct _lowcore, user_exec_asce));
-        DEFINE(__LC_CPUID, offsetof(struct _lowcore, cpu_id));
         DEFINE(__LC_INT_CLOCK, offsetof(struct _lowcore, int_clock));
         DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
         DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func));
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 9d1f76702d47..51838ad42d56 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -328,8 +328,8 @@ iplstart:
 #
 # reset files in VM reader
 #
-        stidp   __LC_CPUID              # store cpuid
-        tm      __LC_CPUID,0xff         # running VM ?
+        stidp   __LC_SAVE_AREA          # store cpuid
+        tm      __LC_SAVE_AREA,0xff     # running VM ?
         bno     .Lnoreset
         la      %r2,.Lreset
         lhi     %r3,26
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 0729f36c2fe3..ecb2d02b02e4 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -18,24 +18,42 @@
 #include <asm/lowcore.h>
 #include <asm/param.h>
 
+static DEFINE_PER_CPU(struct cpuid, cpu_id);
+
+/*
+ * cpu_init - initializes state that is per-CPU.
+ */
+void __cpuinit cpu_init(void)
+{
+        struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
+        get_cpu_id(id);
+        atomic_inc(&init_mm.mm_count);
+        current->active_mm = &init_mm;
+        BUG_ON(current->mm);
+        enter_lazy_tlb(&init_mm, current);
+}
+
+/*
+ * print_cpu_info - print basic information about a cpu
+ */
 void __cpuinit print_cpu_info(void)
 {
+        struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
         pr_info("Processor %d started, address %d, identification %06X\n",
-                S390_lowcore.cpu_nr, S390_lowcore.cpu_addr,
-                S390_lowcore.cpu_id.ident);
+                S390_lowcore.cpu_nr, S390_lowcore.cpu_addr, id->ident);
 }
 
 /*
  * show_cpuinfo - Get information on one CPU for use by procfs.
  */
-
 static int show_cpuinfo(struct seq_file *m, void *v)
 {
         static const char *hwcap_str[10] = {
                 "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
                 "edat", "etf3eh", "highgprs"
         };
-        struct _lowcore *lc;
         unsigned long n = (unsigned long) v - 1;
         int i;
 
@@ -55,19 +73,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         }
 
         if (cpu_online(n)) {
-#ifdef CONFIG_SMP
-                lc = (smp_processor_id() == n) ?
-                        &S390_lowcore : lowcore_ptr[n];
-#else
-                lc = &S390_lowcore;
-#endif
+                struct cpuid *id = &per_cpu(cpu_id, n);
                 seq_printf(m, "processor %li: "
                            "version = %02X,  "
                            "identification = %06X,  "
                            "machine = %04X\n",
-                           n, lc->cpu_id.version,
-                           lc->cpu_id.ident,
-                           lc->cpu_id.machine);
+                           n, id->version, id->ident, id->machine);
         }
         preempt_enable();
         return 0;
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 91625f759ccd..6309276516b9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -113,22 +113,6 @@ static struct resource data_resource = {
 };
 
 /*
- * cpu_init() initializes state that is per-CPU.
- */
-void __cpuinit cpu_init(void)
-{
-        /*
-         * Store processor id in lowcore (used e.g. in timer_interrupt)
-         */
-        get_cpu_id(&S390_lowcore.cpu_id);
-
-        atomic_inc(&init_mm.mm_count);
-        current->active_mm = &init_mm;
-        BUG_ON(current->mm);
-        enter_lazy_tlb(&init_mm, current);
-}
-
-/*
  * condev= and conmode= setup parameter.
  */
 
@@ -695,6 +679,7 @@ static void __init setup_hwcaps(void)
         static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
         unsigned long long facility_list_extended;
         unsigned int facility_list;
+        struct cpuid cpu_id;
         int i;
 
         facility_list = stfl();
@@ -756,7 +741,8 @@ static void __init setup_hwcaps(void)
          */
         elf_hwcap |= HWCAP_S390_HIGH_GPRS;
 
-        switch (S390_lowcore.cpu_id.machine) {
+        get_cpu_id(&cpu_id);
+        switch (cpu_id.machine) {
         case 0x9672:
 #if !defined(CONFIG_64BIT)
         default:        /* Use "g5" as default for 31 bit kernels. */