drivers/crypto/ccree/cc_driver.c:117:18: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false

From: kernel test robot
Date: Tue Sep 28 2021 - 01:01:58 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 92477dd1faa650e50bd3bb35a6c0b8d09198cc35
commit: 05c2a705917b77e0915cca3551583583f4eafcf8 crypto: ccree - rework cache parameters handling
date: 10 months ago
config: arm64-randconfig-r016-20210927 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=05c2a705917b77e0915cca3551583583f4eafcf8
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 05c2a705917b77e0915cca3551583583f4eafcf8
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/crypto/ccree/cc_driver.c:117:18: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare]
cache_params |= FIELD_PREP(mask, val);
^~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK'
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:319:22: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:307:23: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:299:9: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^~~~~~~~~
drivers/crypto/ccree/cc_driver.c:121:18: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare]
cache_params |= FIELD_PREP(mask, val);
^~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK'
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:319:22: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:307:23: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:299:9: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^~~~~~~~~
drivers/crypto/ccree/cc_driver.c:125:18: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare]
cache_params |= FIELD_PREP(mask, val);
^~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK'
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:319:22: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:307:23: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:299:9: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^~~~~~~~~
drivers/crypto/ccree/cc_driver.c:143:15: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare]
ace_const |= FIELD_PREP(mask, val);
^~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK'
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:319:22: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:307:23: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:299:9: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^~~~~~~~~
drivers/crypto/ccree/cc_driver.c:147:15: warning: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare]
ace_const |= FIELD_PREP(mask, val);
^~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK'
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:319:22: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:307:23: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)

vim +117 drivers/crypto/ccree/cc_driver.c

102
103 static void init_cc_cache_params(struct cc_drvdata *drvdata)
104 {
105 struct device *dev = drvdata_to_dev(drvdata);
106 u32 cache_params, ace_const, val, mask;
107
108 /* compute CC_AXIM_CACHE_PARAMS */
109 cache_params = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));
110 dev_dbg(dev, "Cache params previous: 0x%08X\n", cache_params);
111
112 /* non cached or write-back, write allocate */
113 val = drvdata->coherent ? 0xb : 0x2;
114
115 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE);
116 cache_params &= ~mask;
> 117 cache_params |= FIELD_PREP(mask, val);
118
119 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE_LAST);
120 cache_params &= ~mask;
121 cache_params |= FIELD_PREP(mask, val);
122
123 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_ARCACHE);
124 cache_params &= ~mask;
125 cache_params |= FIELD_PREP(mask, val);
126
127 drvdata->cache_params = cache_params;
128
129 dev_dbg(dev, "Cache params current: 0x%08X\n", cache_params);
130
131 if (drvdata->hw_rev <= CC_HW_REV_710)
132 return;
133
134 /* compute CC_AXIM_ACE_CONST */
135 ace_const = cc_ioread(drvdata, CC_REG(AXIM_ACE_CONST));
136 dev_dbg(dev, "ACE-const previous: 0x%08X\n", ace_const);
137
138 /* system or outer-sharable */
139 val = drvdata->coherent ? 0x2 : 0x3;
140
141 mask = CC_GENMASK(CC_AXIM_ACE_CONST_ARDOMAIN);
142 ace_const &= ~mask;
143 ace_const |= FIELD_PREP(mask, val);
144
145 mask = CC_GENMASK(CC_AXIM_ACE_CONST_AWDOMAIN);
146 ace_const &= ~mask;
147 ace_const |= FIELD_PREP(mask, val);
148
149 dev_dbg(dev, "ACE-const current: 0x%08X\n", ace_const);
150
151 drvdata->ace_const = ace_const;
152 }
153

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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