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authorOleg Nesterov <oleg@redhat.com>2009-12-15 16:47:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 07:20:08 -0800
commitc6a47cc2ccf9649ee09eeddd70a6d061bde69568 (patch)
treeb5ff696302607cd8f325199f84f88448e6475b84 /include/linux/ptrace.h
parentaa20d489ceb024f91aae084ee00c47fc6a12255c (diff)
downloadop-kernel-dev-c6a47cc2ccf9649ee09eeddd70a6d061bde69568.zip
op-kernel-dev-c6a47cc2ccf9649ee09eeddd70a6d061bde69568.tar.gz
ptrace: cleanup ptrace_init_task()->ptrace_link() path
No functional changes. ptrace_init_task() looks confusing, as if we always auto-attach when "bool ptrace" argument is true, while in fact we attach only if current is traced. Make the code more explicit and kill now unused ptrace_link(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/ptrace.h')
-rw-r--r--include/linux/ptrace.h11
1 files changed, 3 insertions, 8 deletions
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 7456d7d..1951805 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -105,12 +105,7 @@ static inline int ptrace_reparented(struct task_struct *child)
{
return child->real_parent != child->parent;
}
-static inline void ptrace_link(struct task_struct *child,
- struct task_struct *new_parent)
-{
- if (unlikely(child->ptrace))
- __ptrace_link(child, new_parent);
-}
+
static inline void ptrace_unlink(struct task_struct *child)
{
if (unlikely(child->ptrace))
@@ -169,9 +164,9 @@ static inline void ptrace_init_task(struct task_struct *child, bool ptrace)
INIT_LIST_HEAD(&child->ptraced);
child->parent = child->real_parent;
child->ptrace = 0;
- if (unlikely(ptrace)) {
+ if (unlikely(ptrace) && (current->ptrace & PT_PTRACED)) {
child->ptrace = current->ptrace;
- ptrace_link(child, current->parent);
+ __ptrace_link(child, current->parent);
}
}
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