The patch titled
sched: remove long deprecated CLONE_STOPPED flag
has been added to the -mm tree. Its filename is
sched-remove-long-deprecated-clone_stopped-flag.patch
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------------------------------------------------------
Subject: sched: remove long deprecated CLONE_STOPPED flag
From: Dave Jones <davej@xxxxxxxxxx>
This warning was added in commit bdff746a3915 ("clone: prepare to recycle
CLONE_STOPPED") three years ago. 2.6.26 came and went. As far as I know,
no-one is actually using CLONE_STOPPED.
Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched.h | 3 ++-
kernel/fork.c | 28 +---------------------------
2 files changed, 3 insertions(+), 28 deletions(-)
diff -puN include/linux/sched.h~sched-remove-long-deprecated-clone_stopped-flag include/linux/sched.h
--- a/include/linux/sched.h~sched-remove-long-deprecated-clone_stopped-flag
+++ a/include/linux/sched.h
@@ -21,7 +21,8 @@
#define CLONE_DETACHED 0x00400000 /* Unused, ignored */
#define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
#define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
-#define CLONE_STOPPED 0x02000000 /* Start in stopped state */
+/* 0x02000000 was previously the unused CLONE_STOPPED (Start in stopped state)
+ and is now available for re-use. */
#define CLONE_NEWUTS 0x04000000 /* New utsname group? */
#define CLONE_NEWIPC 0x08000000 /* New ipcs */
#define CLONE_NEWUSER 0x10000000 /* New user namespace */
diff -puN kernel/fork.c~sched-remove-long-deprecated-clone_stopped-flag kernel/fork.c
--- a/kernel/fork.c~sched-remove-long-deprecated-clone_stopped-flag
+++ a/kernel/fork.c
@@ -1411,23 +1411,6 @@ long do_fork(unsigned long clone_flags,
}
/*
- * We hope to recycle these flags after 2.6.26
- */
- if (unlikely(clone_flags & CLONE_STOPPED)) {
- static int __read_mostly count = 100;
-
- if (count > 0 && printk_ratelimit()) {
- char comm[TASK_COMM_LEN];
-
- count--;
- printk(KERN_INFO "fork(): process `%s' used deprecated "
- "clone flags 0x%lx\n",
- get_task_comm(comm, current),
- clone_flags & CLONE_STOPPED);
- }
- }
-
- /*
* When called from kernel_thread, don't do user tracing stuff.
*/
if (likely(user_mode(regs)))
@@ -1465,16 +1448,7 @@ long do_fork(unsigned long clone_flags,
*/
p->flags &= ~PF_STARTING;
- if (unlikely(clone_flags & CLONE_STOPPED)) {
- /*
- * We'll start up with an immediate SIGSTOP.
- */
- sigaddset(&p->pending.signal, SIGSTOP);
- set_tsk_thread_flag(p, TIF_SIGPENDING);
- __set_task_state(p, TASK_STOPPED);
- } else {
- wake_up_new_task(p, clone_flags);
- }
+ wake_up_new_task(p, clone_flags);
tracehook_report_clone_complete(trace, regs,
clone_flags, nr, p);
_
Patches currently in -mm which might be from davej@xxxxxxxxxx are
linux-next.patch
sched-remove-long-deprecated-clone_stopped-flag.patch
checkpatch-check-for-world-writeable-sysfs-debugfs-files.patch
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