linux-kernel - drivers/gpu/drm/msm/msm_drv.c:123:15: warning: no previous prototype for '_msm

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Date:   Fri, 4 Sep 2020 12:21:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Eric Anholt <eric@...olt.net>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Rob Clark <robdclark@...omium.org>
Subject: drivers/gpu/drm/msm/msm_drv.c:123:15: warning: no previous prototype
 for '_msm_ioremap'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   59126901f200f5fc907153468b03c64e0081b6e6
commit: 62a35e81c2c1bae04fdefde56f2a92dd3e56164d drm/msm: Quiet error during failure in optional resource mappings.
date:   5 weeks ago
config: arm64-randconfig-r013-20200904 (attached as .config)
compiler: aarch64-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
        git checkout 62a35e81c2c1bae04fdefde56f2a92dd3e56164d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/msm/msm_drv.c:123:15: warning: no previous prototype for '_msm_ioremap' [-Wmissing-prototypes]
     123 | void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
         |               ^~~~~~~~~~~~

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62a35e81c2c1bae04fdefde56f2a92dd3e56164d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 62a35e81c2c1bae04fdefde56f2a92dd3e56164d
vim +/_msm_ioremap +123 drivers/gpu/drm/msm/msm_drv.c

   122	
 > 123	void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
   124				   const char *dbgname, bool quiet)
   125	{
   126		struct resource *res;
   127		unsigned long size;
   128		void __iomem *ptr;
   129	
   130		if (name)
   131			res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
   132		else
   133			res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   134	
   135		if (!res) {
   136			if (!quiet)
   137				DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
   138			return ERR_PTR(-EINVAL);
   139		}
   140	
   141		size = resource_size(res);
   142	
   143		ptr = devm_ioremap(&pdev->dev, res->start, size);
   144		if (!ptr) {
   145			if (!quiet)
   146				DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
   147			return ERR_PTR(-ENOMEM);
   148		}
   149	
   150		if (reglog)
   151			printk(KERN_DEBUG "IO:region %s %p %08lx\n", dbgname, ptr, size);
   152	
   153		return ptr;
   154	}
   155	

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

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