From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [mips-linux:mips-next 98/101] kernel/time/test_udelay.c:57:2: error: couldn't allocate output register for constraint 'x'
Date: Thu, 22 Apr 2021 06:58:46 +0800 [thread overview]
Message-ID: <202104220630.7IMcfLKi-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 23139 bytes --]
Hi Maciej,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git mips-next
head: 182dd5bad52c66a54c300fe320b772456572bf23
commit: c49f71f60754acbff37505e1d16ca796bf8a8140 [98/101] MIPS: Reinstate platform `__div64_32' handler
config: mips-randconfig-r036-20210421 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d87b9b81ccb95217181ce75515c6c68bbb408ca4)
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 mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?id=c49f71f60754acbff37505e1d16ca796bf8a8140
git remote add mips-linux https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
git fetch --no-tags mips-linux mips-next
git checkout c49f71f60754acbff37505e1d16ca796bf8a8140
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> kernel/time/test_udelay.c:57:2: error: couldn't allocate output register for constraint 'x'
do_div(avg, iters);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
1 error generated.
--
kernel/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
^~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
^~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
^~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_TAI] = HRTIMER_BASE_TAI,
^~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:276:20: warning: unused function 'is_migration_base' [-Wunused-function]
static inline bool is_migration_base(struct hrtimer_clock_base *base)
^
kernel/time/hrtimer.c:1707:20: warning: unused function '__hrtimer_peek_ahead_timers' [-Wunused-function]
static inline void __hrtimer_peek_ahead_timers(void)
^
>> kernel/time/hrtimer.c:318:2: error: couldn't allocate output register for constraint 'x'
do_div(tmp, (u32) div);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
6 warnings and 1 error generated.
--
In file included from kernel/time/timekeeping.c:6:
In file included from include/linux/timekeeper_internal.h:10:
In file included from include/linux/clocksource.h:13:
In file included from include/linux/timex.h:56:
In file included from include/uapi/linux/timex.h:56:
In file included from include/linux/time.h:6:
>> include/linux/math64.h:256:14: error: couldn't allocate output register for constraint 'x'
rl.l.high = do_div(rh.ll, divisor);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
In file included from kernel/time/timekeeping.c:6:
In file included from include/linux/timekeeper_internal.h:10:
In file included from include/linux/clocksource.h:13:
In file included from include/linux/timex.h:56:
In file included from include/uapi/linux/timex.h:56:
In file included from include/linux/time.h:6:
include/linux/math64.h:259:2: error: couldn't allocate output register for constraint 'x'
do_div(rl.ll, divisor);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
>> kernel/time/timekeeping.c:328:2: error: couldn't allocate output register for constraint 'x'
do_div(tmp, clock->mult);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
3 errors generated.
--
>> kernel/time/clocksource.c:67:3: error: couldn't allocate output register for constraint 'x'
do_div(tmp, from);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
kernel/time/clocksource.c:675:2: error: couldn't allocate output register for constraint 'x'
do_div(max_cycles, mult+maxadj);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
kernel/time/clocksource.c:869:3: error: couldn't allocate output register for constraint 'x'
do_div(sec, freq);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
kernel/time/clocksource.c:870:3: error: couldn't allocate output register for constraint 'x'
do_div(sec, scale);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
4 errors generated.
--
>> kernel/time/jiffies.c:112:2: error: couldn't allocate output register for constraint 'x'
do_div(shift_hz, cycles_per_tick);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
kernel/time/jiffies.c:116:2: error: couldn't allocate output register for constraint 'x'
do_div(nsec_per_tick, (u32)shift_hz);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
2 errors generated.
--
>> kernel/time/clockevents.c:72:2: error: couldn't allocate output register for constraint 'x'
do_div(clc, evt->mult);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
1 error generated.
--
In file included from block/partitions/core.c:12:
In file included from include/linux/blktrace_api.h:5:
>> include/linux/blkdev.h:1499:27: error: couldn't allocate output register for constraint 'x'
unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT)
^
include/linux/math.h:121:26: note: expanded from macro 'sector_div'
#define sector_div(a, b) do_div(a, b)
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
In file included from block/partitions/core.c:12:
In file included from include/linux/blktrace_api.h:5:
include/linux/blkdev.h:1539:11: error: couldn't allocate output register for constraint 'x'
offset = sector_div(sector, granularity);
^
include/linux/math.h:121:26: note: expanded from macro 'sector_div'
#define sector_div(a, b) do_div(a, b)
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
2 errors generated.
--
In file included from drivers/mtd/mtdcore.c:32:
>> include/linux/mtd/mtd.h:572:2: error: couldn't allocate output register for constraint 'x'
do_div(sz, mtd->erasesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
In file included from drivers/mtd/mtdcore.c:32:
include/linux/mtd/mtd.h:580:9: error: couldn't allocate output register for constraint 'x'
return do_div(sz, mtd->erasesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
In file included from drivers/mtd/mtdcore.c:32:
include/linux/mtd/mtd.h:615:2: error: couldn't allocate output register for constraint 'x'
do_div(sz, mtd->writesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
3 errors generated.
--
>> drivers/mtd/mtdconcat.c:861:7: error: couldn't allocate output register for constraint 'x'
do_div(tmp64, curr_erasesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/mtdconcat.c:842:6: error: couldn't allocate output register for constraint 'x'
do_div(tmp64, curr_erasesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/mtdconcat.c:880:3: error: couldn't allocate output register for constraint 'x'
do_div(tmp64, curr_erasesize);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/mtdconcat.c:202:7: error: couldn't allocate output register for constraint 'x'
if (do_div(__to, mtd->writesize) || (total_len % mtd->writesize))
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
4 errors generated.
--
>> drivers/mtd/mtdpart.c:94:15: error: couldn't allocate output register for constraint 'x'
remainder = do_div(tmp, wr_alignment);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/mtdpart.c:176:14: error: couldn't allocate output register for constraint 'x'
remainder = do_div(tmp, wr_alignment);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/mtdpart.c:187:14: error: couldn't allocate output register for constraint 'x'
remainder = do_div(tmp, wr_alignment);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
3 errors generated.
--
>> drivers/mtd/sm_ftl.c:210:13: error: couldn't allocate output register for constraint 'x'
*boffset = do_div(offset, ftl->block_size);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
drivers/mtd/sm_ftl.c:211:11: error: couldn't allocate output register for constraint 'x'
*block = do_div(offset, ftl->max_lba);
^
include/asm-generic/div64.h:245:11: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^
arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
__asm__("divu $0, %z1, %z2" \
^
2 errors generated.
..
vim +57 kernel/time/test_udelay.c
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 27
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 28 static int udelay_test_single(struct seq_file *s, int usecs, uint32_t iters)
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 29 {
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 30 int min = 0, max = 0, fail_count = 0;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 31 uint64_t sum = 0;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 32 uint64_t avg;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 33 int i;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 34 /* Allow udelay to be up to 0.5% fast */
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 35 int allowed_error_ns = usecs * 5;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 36
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 37 for (i = 0; i < iters; ++i) {
4a19bd3d22d51a kernel/time/test_udelay.c Arnd Bergmann 2016-06-17 38 s64 kt1, kt2;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 39 int time_passed;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 40
4a19bd3d22d51a kernel/time/test_udelay.c Arnd Bergmann 2016-06-17 41 kt1 = ktime_get_ns();
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 42 udelay(usecs);
4a19bd3d22d51a kernel/time/test_udelay.c Arnd Bergmann 2016-06-17 43 kt2 = ktime_get_ns();
4a19bd3d22d51a kernel/time/test_udelay.c Arnd Bergmann 2016-06-17 44 time_passed = kt2 - kt1;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 45
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 46 if (i == 0 || time_passed < min)
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 47 min = time_passed;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 48 if (i == 0 || time_passed > max)
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 49 max = time_passed;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 50 if ((time_passed + allowed_error_ns) / 1000 < usecs)
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 51 ++fail_count;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 52 WARN_ON(time_passed < 0);
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 53 sum += time_passed;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 54 }
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 55
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 56 avg = sum;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 @57 do_div(avg, iters);
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 58 seq_printf(s, "%d usecs x %d: exp=%d allowed=%d min=%d avg=%lld max=%d",
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 59 usecs, iters, usecs * 1000,
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 60 (usecs * 1000) - allowed_error_ns, min, avg, max);
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 61 if (fail_count)
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 62 seq_printf(s, " FAIL=%d", fail_count);
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 63 seq_puts(s, "\n");
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 64
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 65 return 0;
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 66 }
e704f93af5a083 kernel/time/udelay_test.c David Riley 2014-06-16 67
:::::: The code@line 57 was first introduced by commit
:::::: e704f93af5a083c07b8f722672d63a1d908daf55 kernel: time: Add udelay_test module to validate udelay
:::::: TO: David Riley <davidriley@chromium.org>
:::::: CC: John Stultz <john.stultz@linaro.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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