Re: [PATCH 2/2] virtio-rng: add sysfs entries for leak detection

[kernel test robot <lkp@intel.com>]

Hi Babis,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.2-rc4 next-20230119]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Babis-Chalios/virtio-rng-implement-entropy-leak-feature/20230120-024631
patch link:    https://lore.kernel.org/r/20230119184349.74072-3-bchalios%40amazon.es
patch subject: [PATCH 2/2] virtio-rng: add sysfs entries for leak detection
config: x86_64-randconfig-s021 (https://download.01.org/0day-ci/archive/20230120/202301201004.z1gRttwb-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/2a801d93b8225555e4cb293a173e2053870cb2d1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Babis-Chalios/virtio-rng-implement-entropy-leak-feature/20230120-024631
        git checkout 2a801d93b8225555e4cb293a173e2053870cb2d1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/char/hw_random/

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

sparse warnings: (new ones prefixed by >>)
>> drivers/char/hw_random/virtio-rng.c:61:9: sparse: sparse: symbol 'virtrng_sysfs_read' was not declared. Should it be static?
>> drivers/char/hw_random/virtio-rng.c:76:5: sparse: sparse: symbol 'virtrng_sysfs_mmap' was not declared. Should it be static?
   drivers/char/hw_random/virtio-rng.c:106:5: sparse: sparse: symbol 'add_fill_on_leak_request' was not declared. Should it be static?
   drivers/char/hw_random/virtio-rng.c:120:5: sparse: sparse: symbol 'virtrng_fill_on_leak' was not declared. Should it be static?
   drivers/char/hw_random/virtio-rng.c:141:5: sparse: sparse: symbol 'add_copy_on_leak_request' was not declared. Should it be static?
   drivers/char/hw_random/virtio-rng.c:160:5: sparse: sparse: symbol 'virtrng_copy_on_leak' was not declared. Should it be static?

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https://github.com/intel/lkp-tests