x86: fixes some bugs about EFI memory map handling

This patch fixes some bugs of EFI memory handing code.

- On x86_64, it is possible that EFI memory map can not be mapped via
  identity map, so efi_map_memmap is removed, just use early_ioremap.

- On i386, the EFI memory map mapping take effect cross paging_init,
  so it is not necessary to use efi_map_memmap.

- EFI memory map is unmapped in efi_enter_virtual_mode to avoid
  early_ioremap leak.

Signed-off-by: Huang Ying <ying.huang@intel.com>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 15 deletions

diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index 114b896d7573..cb91f985b4a1 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -109,18 +109,3 @@ void efi_call_phys_epilog(void)
 
         local_irq_restore(efi_rt_eflags);
 }
-
-/*
- * We need to map the EFI memory map again after paging_init().
- */
-void __init efi_map_memmap(void)
-{
-        memmap.map = NULL;
-
-        memmap.map = early_ioremap((unsigned long) memmap.phys_map,
-                        (memmap.nr_map * memmap.desc_size));
-        if (memmap.map == NULL)
-                printk(KERN_ERR "Could not remap the EFI memmap!\n");
-
-        memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
-}