x86: fix ldt limit for 64 bit
Michael Karcher [Fri, 11 Jul 2008 16:04:46 +0000 (18:04 +0200)]
Fix size of LDT entries. On x86-64, ldt_desc is a double-sized descriptor.

Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/asm-x86/desc.h

index 268a012..28bddbc 100644 (file)
@@ -192,8 +192,8 @@ static inline void native_set_ldt(const void *addr, unsigned int entries)
                unsigned cpu = smp_processor_id();
                ldt_desc ldt;
 
-               set_tssldt_descriptor(&ldt, (unsigned long)addr,
-                                     DESC_LDT, entries * sizeof(ldt) - 1);
+               set_tssldt_descriptor(&ldt, (unsigned long)addr, DESC_LDT,
+                                     entries * LDT_ENTRY_SIZE - 1);
                write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
                                &ldt, DESC_LDT);
                asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8));