On Thu, Oct 26, 2023 at 05:40:59PM -0400, Matthew Sakai wrote: > MurmurHash3 is a fast, non-cryptographic, 128-bit hash. It was originally > written by Austin Appleby and placed in the public domain. This version has > been modified to produce the same result on both big endian and little > endian processors, making it suitable for use in portable persistent data. > > Co-developed-by: J. corwin Coburn <[email protected]> > Signed-off-by: J. corwin Coburn <[email protected]> > Co-developed-by: Ken Raeburn <[email protected]> > Signed-off-by: Ken Raeburn <[email protected]> > Co-developed-by: John Wiele <[email protected]> > Signed-off-by: John Wiele <[email protected]> > Signed-off-by: Matthew Sakai <[email protected]> > --- [ ... ] > + > +#define ROTL64(x, y) rotl64(x, y) > +static __always_inline u64 getblock64(const u64 *p, int i) > +{ > +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ > + return p[i]; > +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ > + return __builtin_bswap64(p[i]); > +#else > +#error "can't figure out byte order" > +#endif > +} > + > +static __always_inline void putblock64(u64 *p, int i, u64 value) > +{ > +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ > + p[i] = value; > +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ > + p[i] = __builtin_bswap64(value); > +#else > +#error "can't figure out byte order" > +#endif > +}
On sparc64, with gcc 11.4, the above code results in: ERROR: modpost: "__bswapdi2" [drivers/md/dm-vdo/dm-vdo.ko] undefined! Guenter
