[android-common:main-16k-gs-shusky-5.15 35/35] drivers/cma_test/cma_alloc_test_drv.c:122:8: warning: GCC does not allow variable declarations in for loop initializers before C99

Hi Juan,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common main-16k-gs-shusky-5.15
head:   d0ed0375a65ca817f907805e163e103822348f02
commit: 43b8bd1b3be373d3fd2e20886db6cb08d4081ad5 [35/35] ANDROID: cma: Allocate CMA memory at probing time
config: x86_64-randconfig-161-20260728 (https://download.01.org/0day-ci/archive/20260728/[email protected]/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 890b11e09e45e9d8b29f2f94f22052be3934e757)
smatch: v0.5.0-9187-g5189e3fb
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260728/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

   In file included from <built-in>:3:
   In file included from include/linux/compiler_types.h:80:
   include/linux/compiler-clang.h:24:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined]
      24 | #define __SANITIZE_ADDRESS__
         |         ^
   <built-in>:356:9: note: previous definition is here
     356 | #define __SANITIZE_ADDRESS__ 1
         |         ^
   drivers/cma_test/cma_alloc_test_drv.c:104:24: error: no member named 'cma_area' in 'struct device'
     104 |         if (ret || !pdev->dev.cma_area) {
         |                     ~~~~~~~~~ ^
   drivers/cma_test/cma_alloc_test_drv.c:117:22: error: no member named 'cma_area' in 'struct device'
     117 |         cma_ptr = pdev->dev.cma_area;
         |                   ~~~~~~~~~ ^
>> drivers/cma_test/cma_alloc_test_drv.c:122:8: warning: GCC does not allow variable declarations in for loop initializers before C99 [-Wgcc-compat]
     122 |                 for (int i = 0; i < nr_pages; i++) {
         |                      ^
   drivers/cma_test/cma_alloc_test_drv.c:167:12: error: incompatible function pointer types initializing 'int (*)(struct platform_device *)' with an expression of type 'void (struct platform_device *)' [-Wincompatible-function-pointer-types]
     167 |         .remove = cma_test_remove,
         |                   ^~~~~~~~~~~~~~~
   2 warnings and 3 errors generated.


vim +122 drivers/cma_test/cma_alloc_test_drv.c

    88	
    89	static int cma_test_probe(struct platform_device *pdev)
    90	{
    91		int ret;
    92		const struct of_device_id *of_id;
    93	
    94		pr_info("Probing device");
    95	
    96		buffer = NULL;
    97		of_id = of_match_device(cma_test_dt_ids, &pdev->dev);
    98		if (!of_id) {
    99			pr_info("The node was not found in DTB");
   100			return -ENODEV;
   101		}
   102	
   103		ret = of_reserved_mem_device_init(&pdev->dev);
 > 104		if (ret || !pdev->dev.cma_area) {
   105			dev_err(&pdev->dev,
   106				"The CMA reserved area is not assigned (ret %d)\n",
   107				ret);
   108			return -EINVAL;
   109		}
   110	
   111		ret = devm_add_action(&pdev->dev, rmem_remove_callback, &pdev->dev);
   112		if (ret) {
   113			of_reserved_mem_device_release(&pdev->dev);
   114			return ret;
   115		}
   116	
   117		cma_ptr = pdev->dev.cma_area;
   118		pages = cma_alloc(cma_ptr, nr_pages, get_order(PAGE_SIZE), false);
   119		if (pages) {
   120			pr_info("CMA allocation of %d pages was successful", nr_pages);
   121			buffer = kmap_local_page(pages);
 > 122			for (int i = 0; i < nr_pages; i++) {
   123				// Write one byte of every page.
   124				buffer[i * PAGE_SIZE] = 'A';
   125			}
   126	
   127		}
   128	
   129		return 0;
   130	}
   131	

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