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coredump: turn core_state->nr_threads into atomic_t

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Turn core_state->nr_threads into atomic_t and kill now unneeded
down_write(&mm->mmap_sem) in exit_mm().

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Roland McGrath <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2008-07-25 01:47:42 -07:00 • committed by Linus Torvalds
commit c5f1cc8c18
3 changed files with 4 additions and 5 deletions
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2
fs/exec.c
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@ -1591,7 +1591,7 @@ static inline int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
}
rcu_read_unlock();
done:
core_state->nr_threads = nr;
atomic_set(&core_state->nr_threads, nr);
return nr;
}