From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Fri, 24 Jan 2014 12:03:42 +0000 (+0100)
Subject: s390/setup: get rid of MACHINE_HAS_MVCOS machine flag
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ca04ddbf537d30b25f6e240b70f19be35fac4313;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

s390/setup: get rid of MACHINE_HAS_MVCOS machine flag

MACHINE_HAS_MVCOS is used exactly once when the machine is brought up.
There is no need to cache the flag in the machine_flags.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 94cfbe442f12..406f3a1e63ef 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -59,7 +59,6 @@ void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
 #define MACHINE_FLAG_DIAG44	(1UL << 4)
 #define MACHINE_FLAG_IDTE	(1UL << 5)
 #define MACHINE_FLAG_DIAG9C	(1UL << 6)
-#define MACHINE_FLAG_MVCOS	(1UL << 7)
 #define MACHINE_FLAG_KVM	(1UL << 8)
 #define MACHINE_FLAG_ESOP	(1UL << 9)
 #define MACHINE_FLAG_EDAT1	(1UL << 10)
@@ -85,7 +84,6 @@ void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
 #define MACHINE_HAS_IDTE	(0)
 #define MACHINE_HAS_DIAG44	(1)
 #define MACHINE_HAS_MVPG	(S390_lowcore.machine_flags & MACHINE_FLAG_MVPG)
-#define MACHINE_HAS_MVCOS	(0)
 #define MACHINE_HAS_EDAT1	(0)
 #define MACHINE_HAS_EDAT2	(0)
 #define MACHINE_HAS_LPP		(0)
@@ -98,7 +96,6 @@ void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
 #define MACHINE_HAS_IDTE	(S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
 #define MACHINE_HAS_DIAG44	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44)
 #define MACHINE_HAS_MVPG	(1)
-#define MACHINE_HAS_MVCOS	(S390_lowcore.machine_flags & MACHINE_FLAG_MVCOS)
 #define MACHINE_HAS_EDAT1	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
 #define MACHINE_HAS_EDAT2	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
 #define MACHINE_HAS_LPP		(S390_lowcore.machine_flags & MACHINE_FLAG_LPP)
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index fca20b5fe79e..6b594439cca5 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -380,8 +380,6 @@ static __init void detect_machine_facilities(void)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2;
 	if (test_facility(3))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
-	if (test_facility(27))
-		S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
 	if (test_facility(40))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_LPP;
 	if (test_facility(50) && test_facility(73))
diff --git a/arch/s390/lib/uaccess_mvcos.c b/arch/s390/lib/uaccess_mvcos.c
index 8c01f3aaf95c..e2685ff2ec4b 100644
--- a/arch/s390/lib/uaccess_mvcos.c
+++ b/arch/s390/lib/uaccess_mvcos.c
@@ -10,6 +10,7 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/mm.h>
+#include <asm/facility.h>
 #include <asm/uaccess.h>
 #include <asm/futex.h>
 #include "uaccess.h"
@@ -242,7 +243,7 @@ EXPORT_SYMBOL(__strncpy_from_user);
 
 static int __init uaccess_init(void)
 {
-	if (!MACHINE_HAS_MVCOS)
+	if (IS_ENABLED(CONFIG_32BIT) || !test_facility(27))
 		static_key_slow_dec(&have_mvcos);
 	return 0;
 }