Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [kbuild-all] [PATCH V3 4/4] dma: add Qualcomm Technologies HIDMA channel driver | Date | Wed, 11 Nov 2015 09:42 +0100 |
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On Wednesday 11 November 2015 10:21:03 Fengguang Wu wrote: > Hi Sinan, > > Sorry please ignore this warning -- it's actually a problem specific > to the mn10300 arch. I'll disable such warning in mn10300 in future.
I just tried to find what happened here. mn10300 appears to define the type based on the gcc version:
#if __GNUC__ == 4 typedef unsigned int __kernel_size_t; typedef signed int __kernel_ssize_t; #else typedef unsigned long __kernel_size_t; typedef signed long __kernel_ssize_t; #endif
while gcc defines it based on whether you are using a Linux targetted gcc or a bare-metal one:
gcc/config/mn10300/linux.h:#undef SIZE_TYPE gcc/config/mn10300/mn10300.h:#undef SIZE_TYPE gcc/config/mn10300/mn10300.h:#define SIZE_TYPE "unsigned int"
I can think of two reasons why it went wrong here:
a) You are using gcc-5.x, and the check in the kernel should be ">=" rather than "==". We should probably fix that regardless
b) You are using a bare-metal gcc rather than a Linux version.
I couldn't find an mn10300 gcc on kernel.org, which one do you use?
Arnd
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