batman-adv: add missing ewma compat declaration
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
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@ -36,6 +36,47 @@
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#define IFF_NO_QUEUE 0; dev->tx_queue_len = 0
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/* Exponentially weighted moving average (EWMA) */
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#define DECLARE_EWMA(name, _factor, _weight) \
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struct ewma_##name { \
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unsigned long internal; \
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}; \
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static inline void ewma_##name##_init(struct ewma_##name *e) \
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{ \
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BUILD_BUG_ON(!__builtin_constant_p(_factor)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight)); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_factor); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight); \
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e->internal = 0; \
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} \
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static inline unsigned long \
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ewma_##name##_read(struct ewma_##name *e) \
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{ \
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BUILD_BUG_ON(!__builtin_constant_p(_factor)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight)); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_factor); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight); \
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return e->internal >> ilog2(_factor); \
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} \
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static inline void ewma_##name##_add(struct ewma_##name *e, \
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unsigned long val) \
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{ \
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unsigned long internal = ACCESS_ONCE(e->internal); \
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unsigned long weight = ilog2(_weight); \
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unsigned long factor = ilog2(_factor); \
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\
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BUILD_BUG_ON(!__builtin_constant_p(_factor)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight)); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_factor); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight); \
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\
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ACCESS_ONCE(e->internal) = internal ? \
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(((internal << weight) - internal) + \
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(val << factor)) >> weight : \
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(val << factor); \
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}
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#endif /* < KERNEL_VERSION(4, 3, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
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