x86/entry: Fix assumptions that the HW TSS is at the beginning of cpu_tss

[mirror_ubuntu-artful-kernel.git] / arch / x86 / kernel / cpu / common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ffee73ec1af1597417e5603564ea35a3731ae19d..e526d82b546c449699924d233304aec2f5923604 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1558,7 +1558,7 @@ void cpu_init(void)
                }
        }
 
-       t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+       t->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
 
        /*
         * <= is required because the CPU will access up to
@@ -1576,7 +1576,7 @@ void cpu_init(void)
         * Initialize the TSS.  Don't bother initializing sp0, as the initial
         * task never enters user mode.
         */
-       set_tss_desc(cpu, t);
+       set_tss_desc(cpu, &t->x86_tss);
        load_TR_desc();
 
        load_mm_ldt(&init_mm);
@@ -1633,12 +1633,12 @@ void cpu_init(void)
         * Initialize the TSS.  Don't bother initializing sp0, as the initial
         * task never enters user mode.
         */
-       set_tss_desc(cpu, t);
+       set_tss_desc(cpu, &t->x86_tss);
        load_TR_desc();
 
        load_mm_ldt(&init_mm);
 
-       t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+       t->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
 
 #ifdef CONFIG_DOUBLEFAULT
        /* Set up doublefault TSS pointer in the GDT */