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coredump: turn mm->core_startup_done into the pointer to struct core_state

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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>
This commit is contained in:
Oleg Nesterov 2008-07-25 01:47:41 -07:00 • committed by Linus Torvalds
commit 32ecb1f26d
3 changed files with 11 additions and 6 deletions
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2
kernel/exit.c
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@ -680,7 +680,7 @@ static void exit_mm(struct task_struct * tsk)
up_read(&mm->mmap_sem);
down_write(&mm->mmap_sem);
if (!--mm->core_waiters)
complete(mm->core_startup_done);
complete(&mm->core_state->startup);
up_write(&mm->mmap_sem);
wait_for_completion(&mm->core_done);