* [tglx-devel:cleanups 15/38] drivers/ptp/ptp_vmclock.c:78:18: error: '__int128' is not supported on this target
@ 2026-04-11 3:20 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-04-11 3:20 UTC (permalink / raw)
To: Thomas Gleixner; +Cc: oe-kbuild-all
Hi Thomas,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git cleanups
head: 4f7b68811bb6be347b794010429e839e7a23b9d8
commit: 7fb0a26394a1f8378dcf335ea5ad47d32621e080 [15/38] ptp: ptp_vmclock: Replace get_cycles() usage
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20260411/202604111120.tefC2mVN-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260411/202604111120.tefC2mVN-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604111120.tefC2mVN-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
drivers/ptp/ptp_vmclock.c: In function 'mul_u64_u64_shr_add_u64':
>> drivers/ptp/ptp_vmclock.c:78:18: error: '__int128' is not supported on this target
78 | unsigned __int128 res = (unsigned __int128)delta * period;
| ^~~~~~~~
drivers/ptp/ptp_vmclock.c:78:43: error: '__int128' is not supported on this target
78 | unsigned __int128 res = (unsigned __int128)delta * period;
| ^~~~~~~~
>> drivers/ptp/ptp_vmclock.c:82:23: warning: right shift count >= width of type [-Wshift-count-overflow]
82 | *res_hi = res >> 64;
| ^~
vim +/__int128 +78 drivers/ptp/ptp_vmclock.c
20503272422693 David Woodhouse 2024-10-06 62
20503272422693 David Woodhouse 2024-10-06 63 #define VMCLOCK_FIELD_PRESENT(_c, _f) \
20503272422693 David Woodhouse 2024-10-06 64 (le32_to_cpu((_c)->size) >= (offsetof(struct vmclock_abi, _f) + \
20503272422693 David Woodhouse 2024-10-06 65 sizeof((_c)->_f)))
20503272422693 David Woodhouse 2024-10-06 66
20503272422693 David Woodhouse 2024-10-06 67 /*
20503272422693 David Woodhouse 2024-10-06 68 * Multiply a 64-bit count by a 64-bit tick 'period' in units of seconds >> 64
20503272422693 David Woodhouse 2024-10-06 69 * and add the fractional second part of the reference time.
20503272422693 David Woodhouse 2024-10-06 70 *
20503272422693 David Woodhouse 2024-10-06 71 * The result is a 128-bit value, the top 64 bits of which are seconds, and
20503272422693 David Woodhouse 2024-10-06 72 * the low 64 bits are (seconds >> 64).
20503272422693 David Woodhouse 2024-10-06 73 */
20503272422693 David Woodhouse 2024-10-06 74 static uint64_t mul_u64_u64_shr_add_u64(uint64_t *res_hi, uint64_t delta,
20503272422693 David Woodhouse 2024-10-06 75 uint64_t period, uint8_t shift,
20503272422693 David Woodhouse 2024-10-06 76 uint64_t frac_sec)
20503272422693 David Woodhouse 2024-10-06 77 {
20503272422693 David Woodhouse 2024-10-06 @78 unsigned __int128 res = (unsigned __int128)delta * period;
20503272422693 David Woodhouse 2024-10-06 79
20503272422693 David Woodhouse 2024-10-06 80 res >>= shift;
20503272422693 David Woodhouse 2024-10-06 81 res += frac_sec;
20503272422693 David Woodhouse 2024-10-06 @82 *res_hi = res >> 64;
20503272422693 David Woodhouse 2024-10-06 83 return (uint64_t)res;
20503272422693 David Woodhouse 2024-10-06 84 }
20503272422693 David Woodhouse 2024-10-06 85
:::::: The code at line 78 was first introduced by commit
:::::: 20503272422693d793b84f88bf23fe4e955d3a33 ptp: Add support for the AMZNC10C 'vmclock' device
:::::: TO: David Woodhouse <dwmw@amazon.co.uk>
:::::: CC: David S. Miller <davem@davemloft.net>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread* [tglx-devel:cleanups 15/38] drivers/ptp/ptp_vmclock.c:78:18: error: '__int128' is not supported on this target
@ 2026-04-10 16:29 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-04-10 16:29 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp
::::::
:::::: Manual check reason: "low confidence bisect report"
::::::
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Thomas Gleixner <tglx@kernel.org>
Hi Thomas,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git cleanups
head: c8e6e3529d3137cb0aba79b565eb04ab8f346829
commit: f0a1b67a6272b9131b4803169e10e5893e40892a [15/38] ptp: ptp_vmclock: Replace get_cycles() usage
:::::: branch date: 55 minutes ago
:::::: commit date: 5 hours ago
config: i386-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260410/202604101824.Dnmbk8as-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260410/202604101824.Dnmbk8as-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@intel.com>
| Closes: https://lore.kernel.org/r/202604101824.Dnmbk8as-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
drivers/ptp/ptp_vmclock.c: In function 'mul_u64_u64_shr_add_u64':
>> drivers/ptp/ptp_vmclock.c:78:18: error: '__int128' is not supported on this target
78 | unsigned __int128 res = (unsigned __int128)delta * period;
| ^~~~~~~~
drivers/ptp/ptp_vmclock.c:78:43: error: '__int128' is not supported on this target
78 | unsigned __int128 res = (unsigned __int128)delta * period;
| ^~~~~~~~
>> drivers/ptp/ptp_vmclock.c:82:23: warning: right shift count >= width of type [-Wshift-count-overflow]
82 | *res_hi = res >> 64;
| ^~
In file included from ./include/linux/device.h:15,
from ./include/linux/acpi.h:15,
from drivers/ptp/ptp_vmclock.c:11:
drivers/ptp/ptp_vmclock.c: In function 'vmclock_probe':
>> drivers/ptp/ptp_vmclock.c:686:31: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'resource_size_t' {aka 'unsigned int'} [-Wformat=]
686 | dev_info(dev, "Region too small (0x%llx)\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~
./include/linux/dev_printk.h:160:58: note: in expansion of macro 'dev_fmt'
160 | dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~
drivers/ptp/ptp_vmclock.c:686:17: note: in expansion of macro 'dev_info'
686 | dev_info(dev, "Region too small (0x%llx)\n",
| ^~~~~~~~
drivers/ptp/ptp_vmclock.c:686:55: note: format string is defined here
686 | dev_info(dev, "Region too small (0x%llx)\n",
| ~~~^
| |
| long long unsigned int
| %x
vim +/__int128 +78 drivers/ptp/ptp_vmclock.c
20503272422693 David Woodhouse 2024-10-06 62
20503272422693 David Woodhouse 2024-10-06 63 #define VMCLOCK_FIELD_PRESENT(_c, _f) \
20503272422693 David Woodhouse 2024-10-06 64 (le32_to_cpu((_c)->size) >= (offsetof(struct vmclock_abi, _f) + \
20503272422693 David Woodhouse 2024-10-06 65 sizeof((_c)->_f)))
20503272422693 David Woodhouse 2024-10-06 66
20503272422693 David Woodhouse 2024-10-06 67 /*
20503272422693 David Woodhouse 2024-10-06 68 * Multiply a 64-bit count by a 64-bit tick 'period' in units of seconds >> 64
20503272422693 David Woodhouse 2024-10-06 69 * and add the fractional second part of the reference time.
20503272422693 David Woodhouse 2024-10-06 70 *
20503272422693 David Woodhouse 2024-10-06 71 * The result is a 128-bit value, the top 64 bits of which are seconds, and
20503272422693 David Woodhouse 2024-10-06 72 * the low 64 bits are (seconds >> 64).
20503272422693 David Woodhouse 2024-10-06 73 */
20503272422693 David Woodhouse 2024-10-06 74 static uint64_t mul_u64_u64_shr_add_u64(uint64_t *res_hi, uint64_t delta,
20503272422693 David Woodhouse 2024-10-06 75 uint64_t period, uint8_t shift,
20503272422693 David Woodhouse 2024-10-06 76 uint64_t frac_sec)
20503272422693 David Woodhouse 2024-10-06 77 {
20503272422693 David Woodhouse 2024-10-06 @78 unsigned __int128 res = (unsigned __int128)delta * period;
20503272422693 David Woodhouse 2024-10-06 79
20503272422693 David Woodhouse 2024-10-06 80 res >>= shift;
20503272422693 David Woodhouse 2024-10-06 81 res += frac_sec;
20503272422693 David Woodhouse 2024-10-06 @82 *res_hi = res >> 64;
20503272422693 David Woodhouse 2024-10-06 83 return (uint64_t)res;
20503272422693 David Woodhouse 2024-10-06 84 }
20503272422693 David Woodhouse 2024-10-06 85
:::::: The code at line 78 was first introduced by commit
:::::: 20503272422693d793b84f88bf23fe4e955d3a33 ptp: Add support for the AMZNC10C 'vmclock' device
:::::: TO: David Woodhouse <dwmw@amazon.co.uk>
:::::: CC: David S. Miller <davem@davemloft.net>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
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