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Subject[PATCH REPOST 1/5] thread_info: Port core code to use update_thread_flag() helpers
Date
This patch ports a couple of relevant bits of the core kernel to
use the new update_thread_flag() helpers.

No functional change.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Oleg Nesterov <oleg@redhat.com>
---
include/trace/syscall.h | 6 ++----
kernel/ptrace.c | 13 +++++--------
2 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index dc8ac27..dcc9bdf 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -37,10 +37,8 @@ struct syscall_metadata {
#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
static inline void syscall_tracepoint_update(struct task_struct *p)
{
- if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
- set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
- else
- clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
+ update_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT,
+ test_thread_flag(TIF_SYSCALL_TRACEPOINT));
}
#else
static inline void syscall_tracepoint_update(struct task_struct *p)
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 21fec73..7a2bd8d 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -785,16 +785,13 @@ static int ptrace_resume(struct task_struct *child, long request,
if (!valid_signal(data))
return -EIO;

- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+ update_tsk_thread_flag(child, TIF_SYSCALL_TRACE,
+ request == PTRACE_SYSCALL);

#ifdef TIF_SYSCALL_EMU
- if (request == PTRACE_SYSEMU || request == PTRACE_SYSEMU_SINGLESTEP)
- set_tsk_thread_flag(child, TIF_SYSCALL_EMU);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
+ update_tsk_thread_flag(child, TIF_SYSCALL_EMU,
+ request == PTRACE_SYSEMU ||
+ request == PTRACE_SYSEMU_SINGLESTEP);
#endif

if (is_singleblock(request)) {
--
2.1.4
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