[S390] eliminate cpuinfo_S390 structure

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

6 files changed, 51 insertions, 74 deletions

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index f94386ece0d3..ad543c11826d 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -80,7 +80,6 @@
 #define __LC_USER_ASCE                  0xC50
 #define __LC_PANIC_STACK                0xC54
 #define __LC_CPUID                      0xC60
-#define __LC_CPUADDR                    0xC68
 #define __LC_IPLDEV                     0xC7C
 #define __LC_CURRENT                    0xC90
 #define __LC_INT_CLOCK                  0xC98
@@ -102,7 +101,6 @@
 #define __LC_USER_ASCE                  0xD60
 #define __LC_PANIC_STACK                0xD68
 #define __LC_CPUID                      0xD80
-#define __LC_CPUADDR                    0xD88
 #define __LC_IPLDEV                     0xDB8
 #define __LC_CURRENT                    0xDD8
 #define __LC_INT_CLOCK                  0xDE8
@@ -273,8 +271,10 @@ struct _lowcore
         __u32        user_exec_asce;           /* 0xc58 */
         __u8         pad10[0xc60-0xc5c];       /* 0xc5c */
         /* entry.S sensitive area start */
-        struct       cpuinfo_S390 cpu_data;    /* 0xc60 */
-        __u32        ipl_device;               /* 0xc7c */
+        cpuid_t      cpu_id;                   /* 0xc60 */
+        __u32        cpu_nr;                   /* 0xc68 */
+        __u32        ipl_device;               /* 0xc6c */
+        __u8         pad_0xc70[0xc80-0xc70];   /* 0xc70 */
         /* entry.S sensitive area end */
 
         /* SMP info area: defined by DJB */
@@ -366,9 +366,10 @@ struct _lowcore
         __u64        user_exec_asce;           /* 0xd70 */
         __u8         pad10[0xd80-0xd78];       /* 0xd78 */
         /* entry.S sensitive area start */
-        struct       cpuinfo_S390 cpu_data;    /* 0xd80 */
-        __u32        ipl_device;               /* 0xdb8 */
-        __u32        pad11;                    /* 0xdbc */
+        cpuid_t      cpu_id;                   /* 0xd80 */
+        __u32        cpu_nr;                   /* 0xd88 */
+        __u32        ipl_device;               /* 0xd8c */
+        __u8         pad_0xd90[0xdc0-0xd90];   /* 0xd90 */
         /* entry.S sensitive area end */
 
         /* SMP info area: defined by DJB */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index db4523fe38ac..61862b3ac794 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -42,22 +42,8 @@ static inline void get_cpu_id(cpuid_t *ptr)
         asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));
 }
 
-struct cpuinfo_S390
-{
-        cpuid_t  cpu_id;
-        __u16    cpu_addr;
-        __u16    cpu_nr;
-        unsigned long loops_per_jiffy;
-        unsigned long *pgd_quick;
-#ifdef __s390x__
-        unsigned long *pmd_quick;
-#endif /* __s390x__ */
-        unsigned long *pte_quick;
-        unsigned long pgtable_cache_sz;
-};
-
 extern void s390_adjust_jiffies(void);
-extern void print_cpu_info(struct cpuinfo_S390 *);
+extern void print_cpu_info(void);
 extern int get_cpu_capability(unsigned int *);
 
 /*
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index 024b91e06239..2009158a4502 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -50,12 +50,7 @@ extern void machine_power_off_smp(void);
  
 #define PROC_CHANGE_PENALTY     20              /* Schedule penalty */
 
-#define raw_smp_processor_id()  (S390_lowcore.cpu_data.cpu_nr)
-
-static inline __u16 hard_smp_processor_id(void)
-{
-        return stap();
-}
+#define raw_smp_processor_id()  (S390_lowcore.cpu_nr)
 
 /*
  * returns 1 if cpu is in stopped/check stopped state or not operational
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 82c1872cfe80..423da1bd42a4 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -18,10 +18,11 @@
 #include <asm/lowcore.h>
 #include <asm/param.h>
 
-void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo)
+void __cpuinit print_cpu_info(void)
 {
         pr_info("Processor %d started, address %d, identification %06X\n",
-                cpuinfo->cpu_nr, cpuinfo->cpu_addr, cpuinfo->cpu_id.ident);
+                S390_lowcore.cpu_nr, S390_lowcore.cpu_addr,
+                S390_lowcore.cpu_id.ident);
 }
 
 /*
@@ -34,44 +35,42 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
                 "edat"
         };
-       struct cpuinfo_S390 *cpuinfo;
-       unsigned long n = (unsigned long) v - 1;
-       int i;
+        struct _lowcore *lc;
+        unsigned long n = (unsigned long) v - 1;
+        int i;
 
-       s390_adjust_jiffies();
-       preempt_disable();
-       if (!n) {
-               seq_printf(m, "vendor_id       : IBM/S390\n"
-                          "# processors    : %i\n"
-                          "bogomips per cpu: %lu.%02lu\n",
-                          num_online_cpus(), loops_per_jiffy/(500000/HZ),
-                          (loops_per_jiffy/(5000/HZ))%100);
-               seq_puts(m, "features\t: ");
-               for (i = 0; i < 8; i++)
-                       if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
-                               seq_printf(m, "%s ", hwcap_str[i]);
-               seq_puts(m, "\n");
-       }
+        s390_adjust_jiffies();
+        preempt_disable();
+        if (!n) {
+                seq_printf(m, "vendor_id       : IBM/S390\n"
+                           "# processors    : %i\n"
+                           "bogomips per cpu: %lu.%02lu\n",
+                           num_online_cpus(), loops_per_jiffy/(500000/HZ),
+                           (loops_per_jiffy/(5000/HZ))%100);
+                seq_puts(m, "features\t: ");
+                for (i = 0; i < 8; i++)
+                        if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
+                                seq_printf(m, "%s ", hwcap_str[i]);
+                seq_puts(m, "\n");
+        }
 
-       if (cpu_online(n)) {
+        if (cpu_online(n)) {
 #ifdef CONFIG_SMP
-               if (smp_processor_id() == n)
-                       cpuinfo = &S390_lowcore.cpu_data;
-               else
-                       cpuinfo = &lowcore_ptr[n]->cpu_data;
+                lc = (smp_processor_id() == n) ?
+                        &S390_lowcore : lowcore_ptr[n];
 #else
-               cpuinfo = &S390_lowcore.cpu_data;
+                lc = &S390_lowcore;
 #endif
-               seq_printf(m, "processor %li: "
-                          "version = %02X,  "
-                          "identification = %06X,  "
-                          "machine = %04X\n",
-                          n, cpuinfo->cpu_id.version,
-                          cpuinfo->cpu_id.ident,
-                          cpuinfo->cpu_id.machine);
-       }
-       preempt_enable();
-       return 0;
+                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);
+        }
+        preempt_enable();
+        return 0;
 }
 
 static void *c_start(struct seq_file *m, loff_t *pos)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index dd3c51736270..9c8853f21bb2 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -121,13 +121,10 @@ static struct resource data_resource = {
  */
 void __cpuinit cpu_init(void)
 {
-        int addr = hard_smp_processor_id();
-
         /*
          * Store processor id in lowcore (used e.g. in timer_interrupt)
          */
-        get_cpu_id(&S390_lowcore.cpu_data.cpu_id);
-        S390_lowcore.cpu_data.cpu_addr = addr;
+        get_cpu_id(&S390_lowcore.cpu_id);
 
         /*
          * Force FPU initialization:
@@ -686,7 +683,6 @@ setup_memory(void)
 static void __init setup_hwcaps(void)
 {
         static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
-        struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;
         unsigned long long facility_list_extended;
         unsigned int facility_list;
         int i;
@@ -732,7 +728,7 @@ static void __init setup_hwcaps(void)
         if (MACHINE_HAS_HPAGE)
                 elf_hwcap |= 1UL << 7;
 
-        switch (cpuinfo->cpu_id.machine) {
+        switch (S390_lowcore.cpu_id.machine) {
         case 0x9672:
 #if !defined(CONFIG_64BIT)
         default:        /* Use "g5" as default for 31 bit kernels. */
@@ -825,7 +821,7 @@ setup_arch(char **cmdline_p)
         setup_lowcore();
 
         cpu_init();
-        __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
+        __cpu_logical_map[0] = stap();
         s390_init_cpu_topology();
 
         /*
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index a8858634dd05..b167f74d94cd 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -372,7 +372,7 @@ static void __init smp_detect_cpus(void)
 
         c_cpus = 1;
         s_cpus = 0;
-        boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr;
+        boot_cpu_addr = __cpu_logical_map[0];
         info = kmalloc(sizeof(*info), GFP_KERNEL);
         if (!info)
                 panic("smp_detect_cpus failed to allocate memory\n");
@@ -446,7 +446,7 @@ int __cpuinit start_secondary(void *cpuvoid)
         /* Switch on interrupts */
         local_irq_enable();
         /* Print info about this processor */
-        print_cpu_info(&S390_lowcore.cpu_data);
+        print_cpu_info();
         /* cpu_idle will call schedule for us */
         cpu_idle();
         return 0;
@@ -564,7 +564,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
                 : : "a" (&cpu_lowcore->access_regs_save_area) : "memory");
         cpu_lowcore->percpu_offset = __per_cpu_offset[cpu];
         cpu_lowcore->current_task = (unsigned long) idle;
-        cpu_lowcore->cpu_data.cpu_nr = cpu;
+        cpu_lowcore->cpu_nr = cpu;
         cpu_lowcore->kernel_asce = S390_lowcore.kernel_asce;
         cpu_lowcore->ipl_device = S390_lowcore.ipl_device;
         eieio();
@@ -656,7 +656,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
         /* request the 0x1201 emergency signal external interrupt */
         if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
                 panic("Couldn't request external interrupt 0x1201");
-        print_cpu_info(&S390_lowcore.cpu_data);
+        print_cpu_info();
 
         /* Reallocate current lowcore, but keep its contents. */
         lc_order = sizeof(long) == 8 ? 1 : 0;