x86: mpparse.c introduce check_physptr helper function

To reduce the size of the oversized function __get_smp_config()

There should be no impact to functionality.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 4216d26..dce99dc 100644 (file)
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -555,6 +555,55 @@ static unsigned long __init get_mpc_size(unsigned long physptr)
        return size;
 }
 
+static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
+{
+       struct mpc_table *mpc;
+       unsigned long size;
+
+       size = get_mpc_size(mpf->physptr);
+       mpc = early_ioremap(mpf->physptr, size);
+       /*
+        * Read the physical hardware table.  Anything here will
+        * override the defaults.
+        */
+       if (!smp_read_mpc(mpc, early)) {
+#ifdef CONFIG_X86_LOCAL_APIC
+               smp_found_config = 0;
+#endif
+               printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"
+                       "... disabling SMP support. (tell your hw vendor)\n");
+               early_iounmap(mpc, size);
+               return -1;
+       }
+       early_iounmap(mpc, size);
+
+       if (early)
+               return -1;
+
+#ifdef CONFIG_X86_IO_APIC
+       /*
+        * If there are no explicit MP IRQ entries, then we are
+        * broken.  We set up most of the low 16 IO-APIC pins to
+        * ISA defaults and hope it will work.
+        */
+       if (!mp_irq_entries) {
+               struct mpc_bus bus;
+
+               printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
+                      "using default mptable. (tell your hw vendor)\n");
+
+               bus.type = MP_BUS;
+               bus.busid = 0;
+               memcpy(bus.bustype, "ISA   ", 6);
+               MP_bus_info(&bus);
+
+               construct_default_ioirq_mptable(0);
+       }
+#endif
+
+       return 0;
+}
+
 /*
  * Scan the memory blocks for an SMP configuration block.
  */
@@ -608,51 +657,8 @@ static void __init __get_smp_config(unsigned int early)
                construct_default_ISA_mptable(mpf->feature1);
 
        } else if (mpf->physptr) {
-               struct mpc_table *mpc;
-               unsigned long size;
-
-               size = get_mpc_size(mpf->physptr);
-               mpc = early_ioremap(mpf->physptr, size);
-               /*
-                * Read the physical hardware table.  Anything here will
-                * override the defaults.
-                */
-               if (!smp_read_mpc(mpc, early)) {
-#ifdef CONFIG_X86_LOCAL_APIC
-                       smp_found_config = 0;
-#endif
-                       printk(KERN_ERR
-                              "BIOS bug, MP table errors detected!...\n");
-                       printk(KERN_ERR "... disabling SMP support. "
-                              "(tell your hw vendor)\n");
-                       early_iounmap(mpc, size);
-                       return;
-               }
-               early_iounmap(mpc, size);
-
-               if (early)
+               if (check_physptr(mpf, early))
                        return;
-#ifdef CONFIG_X86_IO_APIC
-               /*
-                * If there are no explicit MP IRQ entries, then we are
-                * broken.  We set up most of the low 16 IO-APIC pins to
-                * ISA defaults and hope it will work.
-                */
-               if (!mp_irq_entries) {
-                       struct mpc_bus bus;
-
-                       printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
-                              "using default mptable. "
-                              "(tell your hw vendor)\n");
-
-                       bus.type = MP_BUS;
-                       bus.busid = 0;
-                       memcpy(bus.bustype, "ISA   ", 6);
-                       MP_bus_info(&bus);
-
-                       construct_default_ioirq_mptable(0);
-               }
-#endif
        } else
                BUG();