[PATCH] x86_64: fix tss limit

Fix the x86_64 TSS limit in TSS descriptor.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/asm-x86_64/desc.h b/include/asm-x86_64/desc.h
index 68ac3c62fe3defd95145eb2bc80b7c2361c2e1d7..b837820c90733c51534d7eb100a160f19e251fe5 100644 (file)
--- a/include/asm-x86_64/desc.h
+++ b/include/asm-x86_64/desc.h
@@ -129,9 +129,16 @@ static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 { 
-       set_tssldt_descriptor(&cpu_gdt_table[cpu][GDT_ENTRY_TSS], (unsigned long)addr, 
-                             DESC_TSS,
-                             sizeof(struct tss_struct) - 1);
+       /*
+        * sizeof(unsigned long) coming from an extra "long" at the end
+        * of the iobitmap. See tss_struct definition in processor.h
+        *
+        * -1? seg base+limit should be pointing to the address of the
+        * last valid byte
+        */
+       set_tssldt_descriptor(&cpu_gdt_table[cpu][GDT_ENTRY_TSS],
+               (unsigned long)addr, DESC_TSS,
+               IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 } 
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)