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@@ -340,6 +340,22 @@ ieee80211_get_channel(struct wiphy *wiphy, int freq)
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return __ieee80211_get_channel(wiphy, freq);
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}
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+/**
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+ * ieee80211_get_response_rate - get basic rate for a given rate
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+ *
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+ * @sband: the band to look for rates in
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+ * @basic_rates: bitmap of basic rates
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+ * @bitrate: the bitrate for which to find the basic rate
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+ *
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+ * This function returns the basic rate corresponding to a given
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+ * bitrate, that is the next lower bitrate contained in the basic
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+ * rate map, which is, for this function, given as a bitmap of
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+ * indices of rates in the band's bitrate table.
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+ */
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+struct ieee80211_rate *
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+ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
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+ u64 basic_rates, int bitrate);
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+
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/**
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* regulatory_hint - driver hint to the wireless core a regulatory domain
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* @wiphy: the wireless device giving the hint (used only for reporting
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