Also I noticed another bug, this time in LZ4_count():

#if defined(CONFIG_64BIT)
#define LZ4_ARCH64 1
#else
#define LZ4_ARCH64 0
#endif

...

#ifdef LZ4_ARCH64
       if ((pIn < (pInLimit-3))
               && (LZ4_read32(pMatch) == LZ4_read32(pIn))) {
               pIn += 4; pMatch += 4;
       }
#endif

Because of how LZ4_ARCH64 is defined, it needs to be '#if LZ4_ARCH64'.

But I also think the way upstream LZ4 does 64-bit detection could have just been
left as-is; it has a function which gets inlined:

	static unsigned LZ4_64bits(void) { return sizeof(void*)==8; }

Eric