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@@ -317,14 +317,23 @@ static inline int mark_dquot_dirty(struct dquot *dquot)
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return dquot->dq_sb->dq_op->mark_dirty(dquot);
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}
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+/* Mark dquot dirty in atomic manner, and return it's old dirty flag state */
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int dquot_mark_dquot_dirty(struct dquot *dquot)
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{
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+ int ret = 1;
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+
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+ /* If quota is dirty already, we don't have to acquire dq_list_lock */
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+ if (test_bit(DQ_MOD_B, &dquot->dq_flags))
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+ return 1;
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+
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spin_lock(&dq_list_lock);
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- if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags))
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+ if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) {
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list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
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info[dquot->dq_type].dqi_dirty_list);
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+ ret = 0;
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+ }
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spin_unlock(&dq_list_lock);
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- return 0;
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+ return ret;
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}
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EXPORT_SYMBOL(dquot_mark_dquot_dirty);
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