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Subjectarch/mips/bmips/dma.c:43:12: warning: no previous prototype for 'phys_to_dma'
Hi Christoph,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 55f62bc873477dae2c45bbbc30b86cf3e0982f3b
commit: 5ceda74093a5c1c3f42a02b894df031f3bbc9af1 dma-direct: rename and cleanup __phys_to_dma
date: 5 months ago
config: mips-randconfig-r013-20210222 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5ceda74093a5c1c3f42a02b894df031f3bbc9af1
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 5ceda74093a5c1c3f42a02b894df031f3bbc9af1
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/mips/bmips/dma.c:43:12: warning: no previous prototype for 'phys_to_dma' [-Wmissing-prototypes]
43 | dma_addr_t phys_to_dma(struct device *dev, phys_addr_t pa)
| ^~~~~~~~~~~
arch/mips/bmips/dma.c:55:13: warning: no previous prototype for 'dma_to_phys' [-Wmissing-prototypes]
55 | phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
| ^~~~~~~~~~~
arch/mips/bmips/dma.c:67:6: warning: no previous prototype for 'arch_sync_dma_for_cpu_all' [-Wmissing-prototypes]
67 | void arch_sync_dma_for_cpu_all(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/phys_to_dma +43 arch/mips/bmips/dma.c

42
> 43 dma_addr_t phys_to_dma(struct device *dev, phys_addr_t pa)
44 {
45 struct bmips_dma_range *r;
46
47 for (r = bmips_dma_ranges; r && r->size; r++) {
48 if (pa >= r->child_addr &&
49 pa < (r->child_addr + r->size))
50 return pa - r->child_addr + r->parent_addr;
51 }
52 return pa;
53 }
54

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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