sdhc_host_lock
kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]);
kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]);
kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]);
kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]);
kmutex_t *plock = sdhc_host_lock(hp);
kmutex_t *plock = sdhc_host_lock(hp);
kmutex_t *sdhc_host_lock(struct sdhc_host *);