Messages in this thread | | | Date | Sat, 5 Aug 2006 23:16:29 -0700 | From | "Om N." <> | Subject | writing portable code based on BITS_PER_LONG? |
| |
Hi, I am trying to port a driver written for IA32. This is a pci driver and has a chipset doing PCI <-> local bus data transfer, where local bus is 16 bit. So a number of values are converted by right/left shifting by 16 bits.
Now that I am doing porting, I would like to make it fully portable across AMD64 and IA32. What is the best method for this? Should I do something like,
#if BITS_PER_LONG = 64 shiftwidth = 48 #else if BITS_PER_LONG = 32 shiftwidth = 16 #endif
I don't like this. I would not do it if there is some elegant way.
Is there any other way? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |