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Subject[ammarfaizi2-block:google/android/kernel/common/android12-trusty-5.10 1060/5872] arch/arm64/mm/mmu.c:1499:5: warning: no previous prototype for 'check_range_driver_managed'
Hi Sudarshan,

FYI, the error/warning still remains.

tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-trusty-5.10
head: 07055bfd3d810d41a38354693dfaa55a6f8c0025
commit: 1b4aca7d82ae9b40145484fa09ceab38a6a06062 [1060/5872] ANDROID: arm64/mm: implement {populate/depopulate}_range_driver_managed
config: arm64-buildonly-randconfig-r005-20220331 (https://download.01.org/0day-ci/archive/20220331/202203311842.wFWvHrHn-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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://github.com/ammarfaizi2/linux-block/commit/1b4aca7d82ae9b40145484fa09ceab38a6a06062
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-trusty-5.10
git checkout 1b4aca7d82ae9b40145484fa09ceab38a6a06062
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/ drivers/gpu/drm/hisilicon/kirin/

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/arm64/mm/mmu.c:1499:5: warning: no previous prototype for 'check_range_driver_managed' [-Wmissing-prototypes]
1499 | int check_range_driver_managed(u64 start, u64 size, const char *resource_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:7,
from include/linux/kernel.h:16,
from arch/arm64/mm/mmu.c:11:
arch/arm64/mm/mmu.c: In function 'check_range_driver_managed':
include/linux/kern_levels.h:5:25: warning: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 'u64' {aka 'long long unsigned int'} [-Wformat=]
5 | #define KERN_SOH "\001" /* ASCII Start Of Header */
| ^~~~~~
include/linux/kern_levels.h:11:25: note: in expansion of macro 'KERN_SOH'
11 | #define KERN_ERR KERN_SOH "3" /* error conditions */
| ^~~~~~~~
include/linux/printk.h:343:16: note: in expansion of macro 'KERN_ERR'
343 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~~
arch/arm64/mm/mmu.c:1509:17: note: in expansion of macro 'pr_err'
1509 | pr_err("%s: couldn't find memory resource for start 0x%lx\n",
| ^~~~~~


vim +/check_range_driver_managed +1499 arch/arm64/mm/mmu.c

1498
> 1499 int check_range_driver_managed(u64 start, u64 size, const char *resource_name)
1500 {
1501 struct mem_section *ms;
1502 unsigned long pfn = __phys_to_pfn(start);
1503 unsigned long end_pfn = __phys_to_pfn(start + size);
1504 struct resource *res;
1505 unsigned long flags;
1506
1507 res = lookup_resource(&iomem_resource, start);
1508 if (!res) {
1509 pr_err("%s: couldn't find memory resource for start 0x%lx\n",
1510 __func__, start);
1511 return -EINVAL;
1512 }
1513
1514 flags = res->flags;
1515
1516 if (!(flags & IORESOURCE_SYSRAM_DRIVER_MANAGED) ||
1517 strstr(resource_name, "System RAM (") != resource_name)
1518 return -EINVAL;
1519
1520 for (; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
1521 ms = __pfn_to_section(pfn);
1522 if (early_section(ms))
1523 return -EINVAL;
1524 }
1525
1526 return 0;
1527 }
1528

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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