x86: 32-bit EFI runtime service support: fixes in sync with 64-bit support

support according to fixes of x86_64 support.

- Delete efi_rt_lock because it is used during system early boot,
  before SMP is initialized.

- Change local_flush_tlb() to __flush_tlb_all() to flush global page
  mapping.

- Clean up includes.

- Revise Kconfig description.

- Enable noefi kernel parameter on i386.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 5 insertions, 20 deletions

diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index 30f937116288..afd2c3b039d6 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -20,27 +20,15 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/mm.h>
 #include <linux/types.h>
-#include <linux/time.h>
-#include <linux/spinlock.h>
-#include <linux/bootmem.h>
 #include <linux/ioport.h>
-#include <linux/module.h>
 #include <linux/efi.h>
-#include <linux/kexec.h>
 
-#include <asm/setup.h>
 #include <asm/io.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/desc.h>
 #include <asm/tlbflush.h>
 
-#define PFX             "EFI: "
-
 /*
  * To make EFI call EFI runtime service in physical addressing mode we need
  * prelog/epilog before/after the invocation to disable interrupt, to
@@ -49,16 +37,14 @@
  */
 
 static unsigned long efi_rt_eflags;
-static DEFINE_SPINLOCK(efi_rt_lock);
 static pgd_t efi_bak_pg_dir_pointer[2];
 
-void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
+void efi_call_phys_prelog(void)
 {
         unsigned long cr4;
         unsigned long temp;
         struct desc_ptr gdt_descr;
 
-        spin_lock(&efi_rt_lock);
         local_irq_save(efi_rt_eflags);
 
         /*
@@ -88,14 +74,14 @@ void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
         /*
          * After the lock is released, the original page table is restored.
          */
-        local_flush_tlb();
+        __flush_tlb_all();
 
         gdt_descr.address = __pa(get_cpu_gdt_table(0));
         gdt_descr.size = GDT_SIZE - 1;
         load_gdt(&gdt_descr);
 }
 
-void efi_call_phys_epilog(void) __releases(efi_rt_lock)
+void efi_call_phys_epilog(void)
 {
         unsigned long cr4;
         struct desc_ptr gdt_descr;
@@ -119,10 +105,9 @@ void efi_call_phys_epilog(void) __releases(efi_rt_lock)
         /*
          * After the lock is released, the original page table is restored.
          */
-        local_flush_tlb();
+        __flush_tlb_all();
 
         local_irq_restore(efi_rt_eflags);
-        spin_unlock(&efi_rt_lock);
 }
 
 /*
@@ -135,7 +120,7 @@ void __init efi_map_memmap(void)
         memmap.map = bt_ioremap((unsigned long) memmap.phys_map,
                         (memmap.nr_map * memmap.desc_size));
         if (memmap.map == NULL)
-                printk(KERN_ERR PFX "Could not remap the EFI memmap!\n");
+                printk(KERN_ERR "Could not remap the EFI memmap!\n");
 
         memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
 }