linux-kernel - Re: [PATCH] rcu: replace _________p1 with __UNIQUE

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Date:   Tue, 14 Sep 2021 06:57:41 +0800
From:   kernel test robot <lkp@...el.com>
To:     Chun-Hung Tseng <henrybear327@...il.com>, paulmck@...nel.org
Cc:     kbuild-all@...ts.01.org, josh@...htriplett.org,
        rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
        jiangshanlai@...il.com, joel@...lfernandes.org,
        rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chun-Hung Tseng <henrybear327@...il.com>,
        Jim Huang <jserv@...s.ncku.edu.tw>
Subject: Re: [PATCH] rcu: replace _________p1 with __UNIQUE_ID(rcu)

Hi Chun-Hung,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on rcu/dev]
[also build test WARNING on v5.15-rc1 next-20210913]
[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]

url:    https://github.com/0day-ci/linux/commits/Chun-Hung-Tseng/rcu-replace-_________p1-with-__UNIQUE_ID-rcu/20210913-044418
base:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
reproduce: make htmldocs

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 >>):

include/linux/rcupdate.h:379: warning: expecting prototype for unrcu_pointer(). Prototype was for __unrcu_pointer() instead

vim +379 include/linux/rcupdate.h

53ecfba259f54b Paul E. McKenney 2010-09-13  366  
76c8eaafe4f061 Paul E. McKenney 2021-04-21  367  /**
76c8eaafe4f061 Paul E. McKenney 2021-04-21  368   * unrcu_pointer - mark a pointer as not being RCU protected
76c8eaafe4f061 Paul E. McKenney 2021-04-21  369   * @p: pointer needing to lose its __rcu property
76c8eaafe4f061 Paul E. McKenney 2021-04-21  370   *
76c8eaafe4f061 Paul E. McKenney 2021-04-21  371   * Converts @p from an __rcu pointer to a __kernel pointer.
76c8eaafe4f061 Paul E. McKenney 2021-04-21  372   * This allows an __rcu pointer to be used with xchg() and friends.
76c8eaafe4f061 Paul E. McKenney 2021-04-21  373   */
6744ef711df006 Chun-Hung Tseng  2021-09-13  374  #define __unrcu_pointer(p, local)					\
76c8eaafe4f061 Paul E. McKenney 2021-04-21  375  ({									\
6744ef711df006 Chun-Hung Tseng  2021-09-13  376  	typeof(*p) *local = (typeof(*p) *__force)(p);			\
76c8eaafe4f061 Paul E. McKenney 2021-04-21  377  	rcu_check_sparse(p, __rcu);					\
6744ef711df006 Chun-Hung Tseng  2021-09-13  378  	((typeof(*p) __force __kernel *)(local)); 			\
76c8eaafe4f061 Paul E. McKenney 2021-04-21 @379  })
6744ef711df006 Chun-Hung Tseng  2021-09-13  380  #define unrcu_pointer(p) __unrcu_pointer(p, __UNIQUE_ID(rcu))
76c8eaafe4f061 Paul E. McKenney 2021-04-21  381  

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https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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