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authorBorislav Petkov <bp@alien8.de>2015-04-03 14:25:28 +0200
committerIngo Molnar <mingo@kernel.org>2015-04-03 15:29:13 +0200
commit6b51311c976593fb7311322b1647a912cd456ec4 (patch)
treeebc2f1e29b67d7a7af2a53d7a692dd67802decd8 /arch/x86/include/asm/segment.h
parentx86/asm/entry/64: Fix MSR_IA32_SYSENTER_CS MSR value (diff)
downloadlinux-6b51311c976593fb7311322b1647a912cd456ec4.tar.xz
linux-6b51311c976593fb7311322b1647a912cd456ec4.zip
x86/asm/entry/64: Use a define for an invalid segment selector
... instead of a naked number, for better readability. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> 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: Steven Rostedt <rostedt@goodmis.org> Cc: Will Drewry <wad@chromium.org> Link: http://lkml.kernel.org/r/1428054130-25847-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/segment.h')
-rw-r--r--arch/x86/include/asm/segment.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index d394899e055c..5a9856eb12ba 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -39,6 +39,8 @@
/* ... GDT has it cleared */
#define SEGMENT_GDT 0x0
+#define GDT_ENTRY_INVALID_SEG 0
+
#ifdef CONFIG_X86_32
/*
* The layout of the per-CPU GDT under Linux: