diff options
| author | Sukadev Bhattiprolu <sukadev@us.ibm.com> | 2007-05-10 22:23:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-11 08:29:35 -0700 |
| commit | 85868995d9d82de5b0de38d695559daddffef893 (patch) | |
| tree | d66d265a14739e2c622c8e3ce507e09ffc5200fb /kernel/fork.c | |
| parent | 0e29b24aa6b3eb6c161cbb9e42fc20b47e67a7c6 (diff) | |
| download | lwn-85868995d9d82de5b0de38d695559daddffef893.tar.gz lwn-85868995d9d82de5b0de38d695559daddffef893.zip | |
Use struct pid parameter in copy_process()
Modify copy_process() to take a struct pid * parameter instead of a pid_t.
This simplifies the code a bit and also avoids having to call find_pid() to
convert the pid_t to a struct pid.
Changelog:
- Fixed Badari Pulavarty's comments and passed in &init_struct_pid
from fork_idle().
- Fixed Eric Biederman's comments and simplified this patch and
used a new patch to remove the likely(pid) check.
Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: <containers@lists.osdl.org>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 6031800c94cf..cf13c44f3da3 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -956,7 +956,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, unsigned long stack_size, int __user *parent_tidptr, int __user *child_tidptr, - int pid) + struct pid *pid) { int retval; struct task_struct *p = NULL; @@ -1023,7 +1023,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->did_exec = 0; delayacct_tsk_init(p); /* Must remain after dup_task_struct() */ copy_flags(clone_flags, p); - p->pid = pid; + p->pid = pid_nr(pid); retval = -EFAULT; if (clone_flags & CLONE_PARENT_SETTID) if (put_user(p->pid, parent_tidptr)) @@ -1261,7 +1261,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, list_add_tail_rcu(&p->tasks, &init_task.tasks); __get_cpu_var(process_counts)++; } - attach_pid(p, PIDTYPE_PID, find_pid(p->pid)); + attach_pid(p, PIDTYPE_PID, pid); nr_threads++; } @@ -1325,7 +1325,8 @@ struct task_struct * __cpuinit fork_idle(int cpu) struct task_struct *task; struct pt_regs regs; - task = copy_process(CLONE_VM, 0, idle_regs(®s), 0, NULL, NULL, 0); + task = copy_process(CLONE_VM, 0, idle_regs(®s), 0, NULL, NULL, + &init_struct_pid); if (!IS_ERR(task)) init_idle(task, cpu); @@ -1375,7 +1376,7 @@ long do_fork(unsigned long clone_flags, clone_flags |= CLONE_PTRACE; } - p = copy_process(clone_flags, stack_start, regs, stack_size, parent_tidptr, child_tidptr, nr); + p = copy_process(clone_flags, stack_start, regs, stack_size, parent_tidptr, child_tidptr, pid); /* * Do this prior waking up the new thread - the thread pointer * might get invalid after that point, if the thread exits quickly. |