From 25d539c9a958faf092bc1b8736ebc30b49faeebc Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Tue, 28 Jun 2016 13:05:04 +0200 Subject: [PATCH] s390/ptrace: clarify bits in the per_struct The bits single_step and instruction_fetch lost their meaning with git commit 5e9a26928f550157 "[S390] ptrace cleanup". Clarify the comment for these two bits. Signed-off-by: Martin Schwidefsky --- arch/s390/include/uapi/asm/ptrace.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/uapi/asm/ptrace.h b/arch/s390/include/uapi/asm/ptrace.h index a150f4fabe43..77630c74f13b 100644 --- a/arch/s390/include/uapi/asm/ptrace.h +++ b/arch/s390/include/uapi/asm/ptrace.h @@ -359,9 +359,9 @@ typedef struct per_cr_bits bits; } control_regs; /* - * Use these flags instead of setting em_instruction_fetch - * directly they are used so that single stepping can be - * switched on & off while not affecting other tracing + * The single_step and instruction_fetch bits are obsolete, + * the kernel always sets them to zero. To enable single + * stepping use ptrace(PTRACE_SINGLESTEP) instead. */ unsigned single_step : 1; unsigned instruction_fetch : 1; -- 2.39.5