Subject: Re: [PATCH bpf-next v9 1/4] bpf: make common crypto API for TC/XDP programs

From: kernel test robot <[email-masked]>
Date: Wed, 17 Apr 2024 14:17:30 +0800

Hi Vadim,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Vadim-Fedorenko/bpf-make-common-crypto-API-for-TC-XDP-programs/20240417-044349
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20240416204004.3942393-2-vadfed%40meta.com
patch subject: [PATCH bpf-next v9 1/4] bpf: make common crypto API for TC/XDP programs
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240417/[email-masked]/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240417/[email-masked]/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-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All warnings (new ones prefixed by >>):

>> kernel/bpf/crypto.c:53: warning: Function parameter or struct member 'siv_len' not described in 'bpf_crypto_ctx'

vim +53 kernel/bpf/crypto.c

    37	
    38	/**
    39	 * struct bpf_crypto_ctx - refcounted BPF crypto context structure
    40	 * @type:	The pointer to bpf crypto type
    41	 * @tfm:	The pointer to instance of crypto API struct.
    42	 * @rcu:	The RCU head used to free the crypto context with RCU safety.
    43	 * @usage:	Object reference counter. When the refcount goes to 0, the
    44	 *		memory is released back to the BPF allocator, which provides
    45	 *		RCU safety.
    46	 */
    47	struct bpf_crypto_ctx {
    48		const struct bpf_crypto_type *type;
    49		void *tfm;
    50		u32 siv_len;
    51		struct rcu_head rcu;
    52		refcount_t usage;
  > 53	};
    54	

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