Messages in this thread Patch in this message | | | Date | Thu, 2 Apr 2015 05:33:19 -0700 | From | tip-bot for Denys Vlasenko <> | Subject | [tip:x86/asm] x86/asm/boot/64: Use __BOOT_TSS instead of literal $0x20 |
| |
Commit-ID: 40e4f2d177f748a83e7639554ea7d11568a9fa1f Gitweb: http://git.kernel.org/tip/40e4f2d177f748a83e7639554ea7d11568a9fa1f Author: Denys Vlasenko <dvlasenk@redhat.com> AuthorDate: Wed, 1 Apr 2015 16:50:58 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Thu, 2 Apr 2015 12:00:20 +0200
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 <dvlasenk@redhat.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Borislav Petkov <bp@suse.de> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Will Drewry <wad@chromium.org> Link: http://lkml.kernel.org/r/1427899858-7165-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/boot/compressed/head_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 90c1521..b0c0d16 100644 --- 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 /*
| |