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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-28 13:05:04 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-28 13:11:55 +0200 |
| commit | 25d539c9a958faf092bc1b8736ebc30b49faeebc (patch) | |
| tree | b56aa7b78c4294816ee39d26991c9359fa6bd1c3 /arch | |
| parent | s390: stack address vs thread_info (diff) | |
| download | linux-dev-25d539c9a958faf092bc1b8736ebc30b49faeebc.tar.xz linux-dev-25d539c9a958faf092bc1b8736ebc30b49faeebc.zip | |
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 <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/uapi/asm/ptrace.h | 6 |
1 files 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; |