1 files changed, 27 insertions, 11 deletions

diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index cb9abdfced9b..3fa7f9389afe 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -53,6 +53,7 @@
  * any particular GDT layout, because we load our own as soon as we
  * can.
  */
+.section .text.head,"ax",@progbits
 ENTRY(startup_32)
 
 #ifdef CONFIG_PARAVIRT
@@ -141,16 +142,25 @@ page_pde_offset = (__PAGE_OFFSET >> 20);
         jb 10b
         movl %edi,(init_pg_tables_end - __PAGE_OFFSET)
 
-#ifdef CONFIG_SMP
         xorl %ebx,%ebx                          /* This is the boot CPU (BSP) */
         jmp 3f
-
 /*
  * Non-boot CPU entry point; entered from trampoline.S
  * We can't lgdt here, because lgdt itself uses a data segment, but
  * we know the trampoline has already loaded the boot_gdt_table GDT
  * for us.
+ *
+ * If cpu hotplug is not supported then this code can go in init section
+ * which will be freed later
  */
+
+#ifdef CONFIG_HOTPLUG_CPU
+.section .text,"ax",@progbits
+#else
+.section .init.text,"ax",@progbits
+#endif
+
+#ifdef CONFIG_SMP
 ENTRY(startup_32_smp)
         cld
         movl $(__BOOT_DS),%eax
@@ -208,8 +218,8 @@ ENTRY(startup_32_smp)
         xorl %ebx,%ebx
         incl %ebx
 
-3:
 #endif /* CONFIG_SMP */
+3:
 
 /*
  * Enable paging
@@ -309,7 +319,7 @@ is386:	movl $2,%ecx		# set MP
 
         call check_x87
         call setup_pda
-        lgdt cpu_gdt_descr
+        lgdt early_gdt_descr
         lidt idt_descr
         ljmp $(__KERNEL_CS),$1f
 1:      movl $(__KERNEL_DS),%eax        # reload all the segment registers
@@ -319,12 +329,12 @@ is386:	movl $2,%ecx		# set MP
         movl %eax,%ds
         movl %eax,%es
 
-        xorl %eax,%eax                  # Clear FS and LDT
-        movl %eax,%fs
+        xorl %eax,%eax                  # Clear GS and LDT
+        movl %eax,%gs
         lldt %ax
 
         movl $(__KERNEL_PDA),%eax
-        mov  %eax,%gs
+        mov  %eax,%fs
 
         cld                     # gcc2 wants the direction flag cleared at all times
         pushl $0                # fake return address for unwinder
@@ -360,12 +370,12 @@ check_x87:
  * cpu_gdt_table and boot_pda; for secondary CPUs, these will be
  * that CPU's GDT and PDA.
  */
-setup_pda:
+ENTRY(setup_pda)
         /* get the PDA pointer */
         movl start_pda, %eax
 
         /* slot the PDA address into the GDT */
-        mov cpu_gdt_descr+2, %ecx
+        mov early_gdt_descr+2, %ecx
         mov %ax, (__KERNEL_PDA+0+2)(%ecx)               /* base & 0x0000ffff */
         shr $16, %eax
         mov %al, (__KERNEL_PDA+4+0)(%ecx)               /* base & 0x00ff0000 */
@@ -492,6 +502,7 @@ ignore_int:
 #endif
         iret
 
+.section .text
 #ifdef CONFIG_PARAVIRT
 startup_paravirt:
         cld
@@ -502,10 +513,11 @@ startup_paravirt:
         pushl   %ecx
         pushl   %eax
 
-        /* paravirt.o is last in link, and that probe fn never returns */
         pushl   $__start_paravirtprobe
 1:
         movl    0(%esp), %eax
+        cmpl    $__stop_paravirtprobe, %eax
+        je      unhandled_paravirt
         pushl   (%eax)
         movl    8(%esp), %eax
         call    *(%esp)
@@ -517,6 +529,10 @@ startup_paravirt:
 
         addl    $4, (%esp)
         jmp     1b
+
+unhandled_paravirt:
+        /* Nothing wanted us: we're screwed. */
+        ud2
 #endif
 
 /*
@@ -581,7 +597,7 @@ idt_descr:
 
 # boot GDT descriptor (later on used by CPU#0):
         .word 0                         # 32 bit align gdt_desc.address
-ENTRY(cpu_gdt_descr)
+ENTRY(early_gdt_descr)
         .word GDT_ENTRIES*8-1
         .long cpu_gdt_table