On Mon, Mar 03, 2008 at 11:36:51PM -0800, Andrew Morton wrote:
> ERROR: "__ucmpdi2" [drivers/net/wireless/b43legacy/b43legacy.ko] undefined!
> ERROR: "__ucmpdi2" [drivers/net/wireless/b43/b43.ko] undefined!
>
> int b43legacy_dma_init(struct b43legacy_wldev *dev)
> {
> struct b43legacy_dma *dma = &dev->dma;
> struct b43legacy_dmaring *ring;
> int err;
> u64 dmamask;
> enum b43legacy_dmatype type;
>
> dmamask = supported_dma_mask(dev);
> switch (dmamask) {
> default:
> B43legacy_WARN_ON(1);
> case DMA_30BIT_MASK:
> type = B43legacy_DMA_30BIT;
> break;
> case DMA_32BIT_MASK:
> type = B43legacy_DMA_32BIT;
> break;
> case DMA_64BIT_MASK:
> type = B43legacy_DMA_64BIT;
> break;
> }
>
> because some versions of gcc emit a __ucmpdi2 call for switch statements.
Was this when optimizing for size btw? It seems gcc is emitting alot more
calls to libgcc when optimizing for size.
> It might be fixable by switching to an open-coded if/compare/else sequence.
It was just a EXPORT_SYMBOL(__ucmpdi2) missing.
> Or maybe my mips compiler (gcc-3.4.5) is just too old..
I'm trying to keep the tools requirements the same as for x86. So for
32-bit kernels gcc 3.2 is the minimum but 3.2 is broken beyond recovery
for 64-bit code so there a minimum of 3.3 is required.
In practive it is ages that I've last seen a compiler older than gcc 3.4
being used to build a modern kernel for any architecture and 3.2 and 3.3
are a sufficient special case that maybe we should think about deprecating
3.2 and 3.3?
Ralf
