We need to use this value in the checkpoint/restart code and would like to
have a constant instead of a magic '3'.
Changelog:
Mar 30:
. Add CHECKPOINT_SUPPORT in Kconfig (Nathan Lynch)
Mar 03:
. Picked up additional use of magic '3' in ptrace.h
Signed-off-by: Dan Smith <danms@xxxxxxxxxx>
---
arch/s390/Kconfig | 4 ++++
arch/s390/include/asm/ptrace.h | 4 +++-
arch/s390/kernel/compat_ptrace.h | 3 ++-
3 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 6b0a353..98d339e 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -49,6 +49,10 @@ config GENERIC_TIME_VSYSCALL
config GENERIC_CLOCKEVENTS
def_bool y
+config CHECKPOINT_SUPPORT
+ bool
+ default y if 64BIT
+
config GENERIC_BUG
bool
depends on BUG
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 8920025..f1b0516 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -172,6 +172,8 @@
#define NUM_CRS 16
#define NUM_ACRS 16
+#define NUM_CR_WORDS 3
+
#define FPR_SIZE 8
#define FPC_SIZE 4
#define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */
@@ -334,7 +336,7 @@ struct pt_regs
*/
typedef struct
{
- unsigned long cr[3];
+ unsigned long cr[NUM_CR_WORDS];
} per_cr_words;
#define PER_EM_MASK 0xE8000000UL
diff --git a/arch/s390/kernel/compat_ptrace.h b/arch/s390/kernel/compat_ptrace.h
index a2be3a9..123dd66 100644
--- a/arch/s390/kernel/compat_ptrace.h
+++ b/arch/s390/kernel/compat_ptrace.h
@@ -1,10 +1,11 @@
#ifndef _PTRACE32_H
#define _PTRACE32_H
+#include <asm/ptrace.h> /* needed for NUM_CR_WORDS */
#include "compat_linux.h" /* needed for psw_compat_t */
typedef struct {
- __u32 cr[3];
+ __u32 cr[NUM_CR_WORDS];
} per_cr_words32;
typedef struct {
--
1.5.4.3
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