Re: [PATCH] bitfield: Use ffs64(x) to fix missing ffsdi2()

From: kbuild test robot
Date: Mon Oct 09 2017 - 18:37:57 EST

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Hi Geert,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.14-rc4]
[cannot apply to next-20170929]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Geert-Uytterhoeven/bitfield-Use-__ffs64-x-to-fix-missing-__ffsdi2/20171010-050009
config: x86_64-allyesdebian (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All error/warnings (new ones prefixed by >>):

In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/linux/list.h:4,
from include/linux/module.h:9,
from net/mac80211/sta_info.c:12:
In function 'sta_stats_decode_rate',
inlined from 'sta_set_rate_info_rx' at net/mac80211/sta_info.c:2016:2,
inlined from 'sta_set_sinfo' at net/mac80211/sta_info.c:2218:7:
>> include/linux/compiler.h:576:38: error: call to '__compiletime_assert_1971' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))) + (1ULL << __ffs64((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))))) & ((((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))) + (1ULL << __ffs64((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:103:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, _reg, 0U, "FIELD_GET: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:764:32: note: in expansion of macro 'FIELD_GET'
#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~
>> net/mac80211/sta_info.c:1971:14: note: in expansion of macro 'STA_STATS_GET'
rinfo->bw = STA_STATS_GET(BW, rate);
^~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_1973' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) & ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:103:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, _reg, 0U, "FIELD_GET: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:764:32: note: in expansion of macro 'FIELD_GET'
#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~
net/mac80211/sta_info.c:1973:10: note: in expansion of macro 'STA_STATS_GET'
switch (STA_STATS_GET(TYPE, rate)) {
^~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_1976' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))) + (1ULL << __ffs64((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))))) & ((((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))) + (1ULL << __ffs64((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:103:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, _reg, 0U, "FIELD_GET: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:764:32: note: in expansion of macro 'FIELD_GET'
#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~
net/mac80211/sta_info.c:1976:16: note: in expansion of macro 'STA_STATS_GET'
rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
^~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_1977' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))) + (1ULL << __ffs64((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))))) & ((((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))) + (1ULL << __ffs64((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:103:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, _reg, 0U, "FIELD_GET: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:764:32: note: in expansion of macro 'FIELD_GET'
#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~
net/mac80211/sta_info.c:1977:16: note: in expansion of macro 'STA_STATS_GET'
rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
^~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_1978' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) & ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/uapi/linux/sysinfo.h:4,
from include/uapi/linux/kernel.h:4,
from include/linux/cache.h:4,
from include/linux/jiffies.h:4,
from net/mac80211/rx.c:14:
net/mac80211/sta_info.h: In function 'sta_stats_encode_rate':
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_772' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))) + (1ULL << __ffs64((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))))) & ((((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))) + (1ULL << __ffs64((((~0UL) - (1UL << (8)) + 1) & (~0UL >> (64 - 1 - (11))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
>> net/mac80211/sta_info.h:772:6: note: in expansion of macro 'STA_STATS_FIELD'
r = STA_STATS_FIELD(BW, s->bw);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_775' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) & ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:57:3: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
^~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:775:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(SGI, 1);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_775' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) & ((((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))) + (1ULL << __ffs64((((~0UL) - (1UL << (12)) + 1) & (~0UL >> (64 - 1 - (12))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:775:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(SGI, 1);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_779' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) & ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
>> include/linux/bitfield.h:57:3: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
^~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:779:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_779' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) & ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:779:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_780' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))) + (1ULL << __ffs64((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))))) & ((((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))) + (1ULL << __ffs64((((~0UL) - (1UL << (4)) + 1) & (~0UL >> (64 - 1 - (7))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:780:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(VHT_NSS, s->nss);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_781' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))) + (1ULL << __ffs64((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))))) & ((((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))) + (1ULL << __ffs64((((~0UL) - (1UL << (0)) + 1) & (~0UL >> (64 - 1 - (3))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:70:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
>> include/linux/build_bug.h:19:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
^~~~~~~~~~~~
>> include/linux/bitfield.h:62:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2'
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:89:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
>> net/mac80211/sta_info.h:763:34: note: in expansion of macro 'FIELD_PREP'
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
^~~~~~~~~~
net/mac80211/sta_info.h:781:8: note: in expansion of macro 'STA_STATS_FIELD'
r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
^~~~~~~~~~~~~~~
include/linux/compiler.h:576:38: error: call to '__compiletime_assert_784' declared with attribute error: BUILD_BUG_ON failed: ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) & ((((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))) + (1ULL << __ffs64((((~0UL) - (1UL << (13)) + 1) & (~0UL >> (64 - 1 - (15))))))) - 1)) != 0
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:556:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~

vim +/__compiletime_assert_1971 +576 include/linux/compiler.h

9a8ab1c3 Daniel Santos 2013-02-21 562
9a8ab1c3 Daniel Santos 2013-02-21 563 #define _compiletime_assert(condition, msg, prefix, suffix) \
9a8ab1c3 Daniel Santos 2013-02-21 564 __compiletime_assert(condition, msg, prefix, suffix)
9a8ab1c3 Daniel Santos 2013-02-21 565
9a8ab1c3 Daniel Santos 2013-02-21 566 /**
9a8ab1c3 Daniel Santos 2013-02-21 567 * compiletime_assert - break build and emit msg if condition is false
9a8ab1c3 Daniel Santos 2013-02-21 568 * @condition: a compile-time constant condition to check
9a8ab1c3 Daniel Santos 2013-02-21 569 * @msg: a message to emit if condition is false
9a8ab1c3 Daniel Santos 2013-02-21 570 *
9a8ab1c3 Daniel Santos 2013-02-21 571 * In tradition of POSIX assert, this macro will break the build if the
9a8ab1c3 Daniel Santos 2013-02-21 572 * supplied condition is *false*, emitting the supplied error message if the
9a8ab1c3 Daniel Santos 2013-02-21 573 * compiler has support to do so.
9a8ab1c3 Daniel Santos 2013-02-21 574 */
9a8ab1c3 Daniel Santos 2013-02-21 575 #define compiletime_assert(condition, msg) \
9a8ab1c3 Daniel Santos 2013-02-21 @576 _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
9a8ab1c3 Daniel Santos 2013-02-21 577

:::::: The code at line 576 was first introduced by commit
:::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG

:::::: TO: Daniel Santos <daniel.santos@xxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure Open Source Technology Center
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