I intend to use this for a new driver Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx> --- backport/backport-include/linux/bitops.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 backport/backport-include/linux/bitops.h diff --git a/backport/backport-include/linux/bitops.h b/backport/backport-include/linux/bitops.h new file mode 100644 index 0000000..d8aec05 --- /dev/null +++ b/backport/backport-include/linux/bitops.h @@ -0,0 +1,19 @@ +#ifndef __BACKPORT_BITOPS_H +#define __BACKPORT_BITOPS_H +#include_next <linux/bitops.h> +#include <linux/version.h> +#include <generated/utsrelease.h> + +#ifndef GENMASK + +/* + * Create a contiguous bitmask starting at bit position @l and ending at + * position @h. For example + * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. + */ +#define GENMASK(h, l) (((U32_C(1) << ((h) - (l) + 1)) - 1) << (l)) +#define GENMASK_ULL(h, l) (((U64_C(1) << ((h) - (l) + 1)) - 1) << (l)) + +#endif + +#endif /* __BACKPORT_BITOPS_H */ -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe backports" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
