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[PATCH] kill SET_LINKS/REMOVE_LINKS 

Both SET_LINKS() and SET_LINKS/REMOVE_LINKS() have exactly one caller, and
these callers already check thread_group_leader().

This patch kills theese macros, they mix two different things: setting
process's parent and registering it in init_task.tasks list.  Callers are
updated to do these actions by hand.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Oleg Nesterov 2006-03-28 16:11:06 -08:00 committed by Linus Torvalds
parent 9b678ece42
commit c97d98931a
3 changed files with 6 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/sched.h
View File

@ -1186,18 +1186,6 @@ extern void wait_task_inactive(task_t * p);
#define remove_parent(p) list_del_init(&(p)->sibling)
#define add_parent(p) list_add_tail(&(p)->sibling,&(p)->parent->children)
#define REMOVE_LINKS(p) do { \
if (thread_group_leader(p)) \
list_del_init(&(p)->tasks); \
remove_parent(p); \
} while (0)
#define SET_LINKS(p) do { \
if (thread_group_leader(p)) \
list_add_tail(&(p)->tasks,&init_task.tasks); \
add_parent(p); \
} while (0)
#define next_task(p) list_entry((p)->tasks.next, struct task_struct, tasks)
#define prev_task(p) list_entry((p)->tasks.prev, struct task_struct, tasks)

4
kernel/exit.c
View File

@ -54,11 +54,13 @@ static void __unhash_process(struct task_struct *p)
if (thread_group_leader(p)) {
detach_pid(p, PIDTYPE_PGID);
detach_pid(p, PIDTYPE_SID);
list_del_init(&p->tasks);
if (p->pid)
__get_cpu_var(process_counts)--;
}
REMOVE_LINKS(p);
remove_parent(p);
}
void release_task(struct task_struct * p)

4
kernel/fork.c
View File

@ -1181,7 +1181,7 @@ static task_t *copy_process(unsigned long clone_flags,
*/
p->ioprio = current->ioprio;
SET_LINKS(p);
add_parent(p);
if (unlikely(p->ptrace & PT_PTRACED))
__ptrace_link(p, current->parent);
@ -1191,6 +1191,8 @@ static task_t *copy_process(unsigned long clone_flags,
p->signal->session = current->signal->session;
attach_pid(p, PIDTYPE_PGID, process_group(p));
attach_pid(p, PIDTYPE_SID, p->signal->session);
list_add_tail(&p->tasks, &init_task.tasks);
if (p->pid)
__get_cpu_var(process_counts)++;
}