[PATCH 2/2] s390/syscalls: Use define instead of '1' to indicate PER trap

[Sven Schnelle <svens@linux.ibm.com>]

Make the code a bit easier to read by defining SYSCALL_PER_TRAP
instead of passing '1' to __do_syscall().

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
---
 arch/s390/kernel/entry.S   | 2 +-
 arch/s390/kernel/entry.h   | 3 ++-
 arch/s390/kernel/syscall.c | 4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index d70eef7a0b29..10dd9bbdf985 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -368,7 +368,7 @@ SYM_CODE_START(pgm_check_handler)
 	mvc	__LC_RETURN_PSW(8,%r13),__LC_SVC_NEW_PSW(%r13)
 	larl	%r14,.Lsysc_per
 	stg	%r14,__LC_RETURN_PSW+8(%r13)
-	lghi	%r14,1
+	lghi	%r14,SYSCALL_FLAG_PER_TRAP
 	LBEAR	__LC_PGM_LAST_BREAK(%r13)
 	LPSWEY	__LC_RETURN_PSW,__LC_RETURN_LPSWE # branch to .Lsysc_per
 SYM_CODE_END(pgm_check_handler)
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index d18a9a63f6b8..dc84ab497251 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -3,6 +3,7 @@
 #define _ENTRY_H
 
 #define PGM_FLAG_GUEST_FAULT	1
+#define SYSCALL_FLAG_PER_TRAP	1
 
 #ifndef __ASSEMBLER__
 
@@ -26,7 +27,7 @@ void early_pgm_check_handler(void);
 struct task_struct *__switch_to_asm(struct task_struct *prev, struct task_struct *next);
 void __ret_from_fork(struct task_struct *prev, struct pt_regs *regs);
 void __do_pgm_check(struct pt_regs *regs, unsigned long flags);
-void __do_syscall(struct pt_regs *regs, int per_trap);
+void __do_syscall(struct pt_regs *regs, unsigned long flags);
 void __do_early_pgm_check(struct pt_regs *regs);
 
 void do_protection_exception(struct pt_regs *regs);
diff --git a/arch/s390/kernel/syscall.c b/arch/s390/kernel/syscall.c
index 75d5a3cab14e..b6c643756a7c 100644
--- a/arch/s390/kernel/syscall.c
+++ b/arch/s390/kernel/syscall.c
@@ -93,7 +93,7 @@ SYSCALL_DEFINE0(ni_syscall)
 	return -ENOSYS;
 }
 
-void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
+void noinstr __do_syscall(struct pt_regs *regs, unsigned long flags)
 {
 	unsigned long nr;
 
@@ -106,7 +106,7 @@ void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
 		current->thread.last_break = regs->last_break;
 	local_irq_enable();
 	regs->orig_gpr2 = regs->gprs[2];
-	if (unlikely(per_trap))
+	if (unlikely(flags & SYSCALL_FLAG_PER_TRAP))
 		set_thread_flag(TIF_PER_TRAP);
 	regs->flags = 0;
 	set_pt_regs_flag(regs, PIF_SYSCALL);
-- 
2.53.0