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authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-02-12 13:08:27 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-03-25 11:49:33 +0100
commit5a79859ae0f35d25c67a03e82bf0c80592f16a39 (patch)
tree37264d49f069812f19ced94e6ae171814fb7e498 /arch/s390/include/asm/ctl_reg.h
parent1833c9f647e9bda1cd24653ff8f9c207b5f5b911 (diff)
s390: remove 31 bit support
Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ctl_reg.h')
-rw-r--r--arch/s390/include/asm/ctl_reg.h14
1 files changed, 2 insertions, 12 deletions
diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h
index 31ab9f346d7e..cfad7fca01d6 100644
--- a/arch/s390/include/asm/ctl_reg.h
+++ b/arch/s390/include/asm/ctl_reg.h
@@ -9,20 +9,12 @@
#include <linux/bug.h>
-#ifdef CONFIG_64BIT
-# define __CTL_LOAD "lctlg"
-# define __CTL_STORE "stctg"
-#else
-# define __CTL_LOAD "lctl"
-# define __CTL_STORE "stctl"
-#endif
-
#define __ctl_load(array, low, high) { \
typedef struct { char _[sizeof(array)]; } addrtype; \
\
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
asm volatile( \
- __CTL_LOAD " %1,%2,%0\n" \
+ " lctlg %1,%2,%0\n" \
: : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high));\
}
@@ -31,7 +23,7 @@
\
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
asm volatile( \
- __CTL_STORE " %1,%2,%0\n" \
+ " stctg %1,%2,%0\n" \
: "=Q" (*(addrtype *)(&array)) \
: "i" (low), "i" (high)); \
}
@@ -60,9 +52,7 @@ void smp_ctl_clear_bit(int cr, int bit);
union ctlreg0 {
unsigned long val;
struct {
-#ifdef CONFIG_64BIT
unsigned long : 32;
-#endif
unsigned long : 3;
unsigned long lap : 1; /* Low-address-protection control */
unsigned long : 4;

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