coredump: turn mm->core_startup_done into the pointer to struct core_state
mm->core_startup_done points to "struct completion startup_done" allocated
on the coredump_wait()'s stack. Introduce the new structure, core_state,
which holds this "struct completion". This way we can add more info
visible to the threads participating in coredump without enlarging
mm_struct.
No changes in affected .o files.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/exec.c b/fs/exec.c
index e347e6e..7173456 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1597,13 +1597,13 @@
{
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
- struct completion startup_done;
+ struct core_state core_state;
struct completion *vfork_done;
int core_waiters;
init_completion(&mm->core_done);
- init_completion(&startup_done);
- mm->core_startup_done = &startup_done;
+ init_completion(&core_state.startup);
+ mm->core_state = &core_state;
core_waiters = zap_threads(tsk, mm, exit_code);
up_write(&mm->mmap_sem);
@@ -1622,7 +1622,7 @@
}
if (core_waiters)
- wait_for_completion(&startup_done);
+ wait_for_completion(&core_state.startup);
fail:
BUG_ON(mm->core_waiters);
return core_waiters;