[PATCH] i386: clean up identify_cpu

identify_cpu() is used to identify both the boot CPU and secondary
CPUs, but it performs some actions which only apply to the boot CPU.
Those functions are therefore really __init functions, but because
they're called by identify_cpu(), they must be marked __cpuinit.

This patch splits identify_cpu() into identify_boot_cpu() and
identify_secondary_cpu(), and calls the appropriate init functions
from each.  Also, identify_boot_cpu() and all the functions it
dominates are marked __init.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>

4 files changed, 18 insertions, 10 deletions

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 5faf675aab4b..58128585ae60 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -394,7 +394,7 @@ __setup("serialnumber", x86_serial_nr_setup);
 /*
  * This does the hard work of actually picking apart the CPU stuff...
  */
-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 {
         int i;
 
@@ -505,15 +505,22 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 
         /* Init Machine Check Exception if available. */
         mcheck_init(c);
+}
 
-        if (c == &boot_cpu_data)
-                sysenter_setup();
+void __init identify_boot_cpu(void)
+{
+        identify_cpu(&boot_cpu_data);
+        sysenter_setup();
         enable_sep_cpu();
+        mtrr_bp_init();
+}
 
-        if (c == &boot_cpu_data)
-                mtrr_bp_init();
-        else
-                mtrr_ap_init();
+void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
+{
+        BUG_ON(c == &boot_cpu_data);
+        identify_cpu(c);
+        enable_sep_cpu();
+        mtrr_ap_init();
 }
 
 #ifdef CONFIG_X86_HT
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 1c3ad9b406ca..61e2842add36 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -155,7 +155,7 @@ static void __cpuinit smp_store_cpu_info(int id)
 
         *c = boot_cpu_data;
         if (id!=0)
-                identify_cpu(c);
+                identify_secondary_cpu(c);
         /*
          * Mask B, Pentium, but not Pentium MMX
          */
diff --git a/arch/i386/kernel/sysenter.c b/arch/i386/kernel/sysenter.c
index 168f8147d3b4..13ca54a85a1c 100644
--- a/arch/i386/kernel/sysenter.c
+++ b/arch/i386/kernel/sysenter.c
@@ -72,7 +72,7 @@ extern const char vsyscall_int80_start, vsyscall_int80_end;
 extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
 static struct page *syscall_pages[1];
 
-int __cpuinit sysenter_setup(void)
+int __init sysenter_setup(void)
 {
         void *syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
         syscall_pages[0] = virt_to_page(syscall_page);
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index 11838df88603..9d895cc2f312 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -116,7 +116,8 @@ extern char ignore_fpu_irq;
 
 void __init cpu_detect(struct cpuinfo_x86 *c);
 
-extern void identify_cpu(struct cpuinfo_x86 *);
+extern void identify_boot_cpu(void);
+extern void identify_secondary_cpu(struct cpuinfo_x86 *);
 extern void print_cpu_info(struct cpuinfo_x86 *);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern unsigned short num_cache_leaves;