[RFC][v4][PATCH 5/7]: Add target_pids parameter to copy_process()

Sukadev Bhattiprolu sukadev at linux.vnet.ibm.com
Wed Aug 5 23:24:25 PDT 2009


Subject: [RFC][v4][PATCH 5/7]: Add target_pids parameter to copy_process()

The new parameter will be used in a follow-on patch when clone_with_pids()
is implemented.

Signed-off-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
Acked-by: Serge Hallyn <serue at us.ibm.com>
Reviewed-by: Oren Laadan <orenl at cs.columbia.edu>
---
 kernel/fork.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

Index: linux-2.6/kernel/fork.c
===================================================================
--- linux-2.6.orig/kernel/fork.c	2009-08-05 19:35:08.000000000 -0700
+++ linux-2.6/kernel/fork.c	2009-08-05 19:35:34.000000000 -0700
@@ -949,12 +949,12 @@
 					unsigned long stack_size,
 					int __user *child_tidptr,
 					struct pid *pid,
+					pid_t *target_pids,
 					int trace)
 {
 	int retval;
 	struct task_struct *p;
 	int cgroup_callbacks_done = 0;
-	pid_t *target_pids = NULL;
 
 	if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
 		return ERR_PTR(-EINVAL);
@@ -1330,7 +1330,7 @@
 	struct pt_regs regs;
 
 	task = copy_process(CLONE_VM, 0, idle_regs(&regs), 0, NULL,
-			    &init_struct_pid, 0);
+			    &init_struct_pid, NULL, 0);
 	if (!IS_ERR(task))
 		init_idle(task, cpu);
 
@@ -1353,6 +1353,7 @@
 	struct task_struct *p;
 	int trace = 0;
 	long nr;
+	pid_t *target_pids = NULL;
 
 	/*
 	 * Do some preliminary argument and permissions checking before we
@@ -1393,7 +1394,7 @@
 		trace = tracehook_prepare_clone(clone_flags);
 
 	p = copy_process(clone_flags, stack_start, regs, stack_size,
-			 child_tidptr, NULL, trace);
+			 child_tidptr, NULL, target_pids, trace);
 	/*
 	 * Do this prior waking up the new thread - the thread pointer
 	 * might get invalid after that point, if the thread exits quickly.


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