… > +++ b/drivers/mmc/host/sdhci-uhs2.h > @@ -0,0 +1,177 @@ … > +#ifndef __SDHCI_UHS2_H > +#define __SDHCI_UHS2_H … I suggest to omit leading underscores from such identifiers. https://wiki.sei.cmu.edu/confluence/display/c/DCL37-C.+Do+not+declare+or+define+a+reserved+identifier Regards, Markus