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Commit 65875530 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

s390/runtime_instrumentation: re-add signum system call parameter 



Add the signum system call parameter for documentation purposes only,
and without checking if the passed value is a valid real-time signal.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 81507f38

arch/s390/kernel/runtime_instr.c

+9 −1
Original line number Diff line number Diff line
@@ -18,6 +18,8 @@ 
#include <asm/cpu_mf.h>

#include <asm/irq.h>



#include "entry.h"



/* empty control block to disable RI by loading it */

struct runtime_instr_cb runtime_instr_empty_cb;
@@ -59,7 +61,13 @@ static void init_runtime_instr_cb(struct runtime_instr_cb *cb) 
	cb->v = 1;

}



SYSCALL_DEFINE1(s390_runtime_instr, int, command)

/*

 * The signum argument is unused. In older kernels it was used to

 * specify a real-time signal. For backwards compatibility user space

 * should pass a valid real-time signal number (the signum argument

 * was checked in older kernels).

 */

SYSCALL_DEFINE2(s390_runtime_instr, int, command, int, signum)

{

	struct runtime_instr_cb *cb;