x86/asm/boot/64: Use __BOOT_TSS instead of literal $0x20

__BOOT_TSS = (GDT_ENTRY_BOOT_TSS * 8)
GDT_ENTRY_BOOT_TSS = (GDT_ENTRY_BOOT_CS + 2)
GDT_ENTRY_BOOT_CS = 2

(2 + 2) * 8 = 4 * 8 = 32 = 0x20

No code changes.

Signed-off-by: Denys Vlasenko <[email protected]>
Reviewed-by: Steven Rostedt <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Will Drewry <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 90c152135e92cad85b6e88b017e6c46868eb10d5..b0c0d16ef58d1099342c97aff83767dd35c73691 100644 (file)
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -165,7 +165,7 @@ ENTRY(startup_32)
        /* After gdt is loaded */
        xorl    %eax, %eax
        lldt    %ax
-       movl    $0x20, %eax
+       movl    $__BOOT_TSS, %eax
        ltr     %ax
 
        /*