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path: root/drivers/net/ethernet/sfc/efx.h
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Diffstat (limited to 'drivers/net/ethernet/sfc/efx.h')
-rw-r--r--drivers/net/ethernet/sfc/efx.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 5e3f93f04e62..c3ae739e9c7a 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -274,4 +274,13 @@ static inline void efx_device_detach_sync(struct efx_nic *efx)
netif_tx_unlock_bh(dev);
}
+static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
+{
+ if (WARN_ON(down_read_trylock(sem))) {
+ up_read(sem);
+ return false;
+ }
+ return true;
+}
+
#endif /* EFX_EFX_H */