x86, UV: system table in bios accessed after unmap

Use the copy of UV system table in kernel memory, not the one in
bios after unmapping.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20090330225240.GA22776@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
index f63882728d91..63a88e1f987d 100644
--- a/arch/x86/kernel/bios_uv.c
+++ b/arch/x86/kernel/bios_uv.c
@@ -182,7 +182,8 @@ void uv_bios_init(void)
         memcpy(&uv_systab, tab, sizeof(struct uv_systab));
         iounmap(tab);
 
-        printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
+        printk(KERN_INFO "EFI UV System Table Revision %d\n",
+                                        uv_systab.revision);
 }
 #else   /* !CONFIG_EFI */