[PATCH] dmaengine: pl330: Fix linker error "undefined reference to `__aeabi_uldivmod'"

Arnd Bergmann arnd at arndb.de
Thu Nov 13 08:49:05 PST 2014

On Thursday 13 November 2014 16:27:27 Jon Medhurst wrote:
> 32-bit ARM kernels may have a 64-bit dma_addr_t but have no
> implementation of the compiler helper for 64-bit unsigned division,
> therefore the use of the modulo operator in pl330_prep_dma_memcpy causes
> the link error "undefined reference to `__aeabi_uldivmod'"
> As the burst value is always a power of two we can fix the problem, and
> make the code more efficient, by replacing "% burst" with "& (burst-1)".
> Reported-by: kbuild test robot <fengguang.wu at intel.com>
> Signed-off-by: Jon Medhurst <tixy at linaro.org>

Just saw the same thing and was going to send a different patch, but
yours is better.

Acked-by: Arnd Bergmann <arnd at arndb.de>

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