From 85868995d9d82de5b0de38d695559daddffef893 Mon Sep 17 00:00:00 2001 From: Sukadev Bhattiprolu Date: Thu, 10 May 2007 22:23:03 -0700 Subject: [PATCH] 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 Cc: Cedric Le Goater Cc: Dave Hansen Cc: Serge Hallyn Cc: Eric Biederman Cc: Acked-by: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/fork.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index 6031800c94c..cf13c44f3da 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. -- 2.41.0