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Subject[PATCH v21 058/100] c/r: (s390): expose a constant for the number of words (CRs)
Date
We need to use this value in the checkpoint/restart code and would like to
have a constant instead of a magic '3'.

Changelog:
Jan 20:
. Define s390x sys_restart wrapper
Mar 30:
. Add CHECKPOINT_SUPPORT in Kconfig (Nathan Lynch)
Mar 03:
. Picked up additional use of magic '3' in ptrace.h

Cc: linux-s390@vger.kernel.org
Signed-off-by: Dan Smith <danms@us.ibm.com>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Serge E. Hallyn <serue@us.ibm.com>
---
arch/s390/Kconfig | 4 ++++
arch/s390/kernel/process.c | 8 ++++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0d8cd9b..b358e63 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/kernel/process.c b/arch/s390/kernel/process.c
index 799cbb0..15f5719 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -240,6 +240,14 @@ SYSCALL_DEFINE4(clone, unsigned long, newsp, unsigned long, clone_flags,
parent_tidptr, child_tidptr);
}

+#ifdef CONFIG_CHECKPOINT
+SYSCALL_DEFINE4(restart, pid_t, pid, int, fd, unsigned long, flags,
+ int, logfd)
+{
+ return do_sys_restart(pid, fd, flags, logfd);
+}
+#endif
+
SYSCALL_DEFINE4(eclone, unsigned int, flags_low, struct clone_args __user *,
uca, int, args_size, pid_t __user *, pids)
{
--
1.6.3.3


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