linux-kernel - Re: [PATCH v9 18/19] mm: zswap: zswap_store() will process a folio in batches.

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Message-ID: <202505011147.h3jgtfmE-lkp@intel.com>
Date: Thu, 1 May 2025 13:09:38 +0800
From: kernel test robot <lkp@...el.com>
To: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	hannes@...xchg.org, yosry.ahmed@...ux.dev, nphamcs@...il.com,
	chengming.zhou@...ux.dev, usamaarif642@...il.com,
	ryan.roberts@....com, 21cnbao@...il.com,
	ying.huang@...ux.alibaba.com, akpm@...ux-foundation.org,
	linux-crypto@...r.kernel.org, herbert@...dor.apana.org.au,
	davem@...emloft.net, clabbe@...libre.com, ardb@...nel.org,
	ebiggers@...gle.com, surenb@...gle.com, kristen.c.accardi@...el.com
Cc: oe-kbuild-all@...ts.linux.dev, wajdi.k.feghali@...el.com,
	vinodh.gopal@...el.com, kanchana.p.sridhar@...el.com
Subject: Re: [PATCH v9 18/19] mm: zswap: zswap_store() will process a folio
 in batches.

Hi Kanchana,

kernel test robot noticed the following build errors:

[auto build test ERROR on 2c01d9f3c61101355afde90dc5c0b39d9a772ef3]

url:    https://github.com/intel-lab-lkp/linux/commits/Kanchana-P-Sridhar/crypto-acomp-Remove-request-chaining/20250501-045602
base:   2c01d9f3c61101355afde90dc5c0b39d9a772ef3
patch link:    https://lore.kernel.org/r/20250430205305.22844-19-kanchana.p.sridhar%40intel.com
patch subject: [PATCH v9 18/19] mm: zswap: zswap_store() will process a folio in batches.
config: arc-randconfig-001-20250501 (https://download.01.org/0day-ci/archive/20250501/202505011147.h3jgtfmE-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250501/202505011147.h3jgtfmE-lkp@intel.com/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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505011147.h3jgtfmE-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   mm/zswap.c: In function 'zswap_store':
>> include/linux/compiler_types.h:557:45: error: call to '__compiletime_assert_394' declared with attribute error: min(start + batch_size, nr_pages) signedness error
     557 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:538:25: note: in definition of macro '__compiletime_assert'
     538 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:557:9: note: in expansion of macro '_compiletime_assert'
     557 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      93 |         BUILD_BUG_ON_MSG(!__types_ok(ux, uy),           \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:98:9: note: in expansion of macro '__careful_cmp_once'
      98 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:105:25: note: in expansion of macro '__careful_cmp'
     105 | #define min(x, y)       __careful_cmp(min, x, y)
         |                         ^~~~~~~~~~~~~
   mm/zswap.c:1703:23: note: in expansion of macro 'min'
    1703 |                 end = min(start + batch_size, nr_pages);
         |                       ^~~


vim +/__compiletime_assert_394 +557 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  543  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  544  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  545  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  546  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  547  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  548   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  549   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  550   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  551   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  552   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  553   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  554   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  555   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  556  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @557  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  558  

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