From: H. Peter Anvin <hpa@zytor.com>
Date: Wed, 30 Jan 2008 12:33:04 +0000 (+0100)
Subject: x86 setup: correct the base in the GDT_ENTRY() macro
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=387faedb1dee2e917811acd05902cc36142a4850;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

x86 setup: correct the base in the GDT_ENTRY() macro

The GDT_ENTRY() macro in pm.c would incorrectly cut the bottom 8 bits
off the base.  We didn't define any bases with the bottom 8 bits
nonzero, so it is a non-manifest bug, but it's still a bug.

Pointed out by John Smith <johnsmith9344@gmail.com>.
Cc: John Smith <johnsmith9344@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c
index b23cbdc7d547..1a0f936c160b 100644
--- a/arch/x86/boot/pm.c
+++ b/arch/x86/boot/pm.c
@@ -104,7 +104,7 @@ static void reset_coprocessor(void)
 	(((u64)(base & 0xff000000) << 32) |	\
 	 ((u64)flags << 40) |			\
 	 ((u64)(limit & 0x00ff0000) << 32) |	\
-	 ((u64)(base & 0x00ffff00) << 16) |	\
+	 ((u64)(base & 0x00ffffff) << 16) |	\
 	 ((u64)(limit & 0x0000ffff)))
 
 struct gdt_ptr {