Re: [PATCH] kernel/trace: Add TRACING_ALLOW_PRINTK config option

kernel test robot
2020-06-24T18:16:42Z

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Hi Nicolas,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on tip/perf/core kees/for-next/pstore linus/master v5.8-rc2 next-20200624]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Nicolas-Boichat/kernel-trace-Add-TRACING_ALLOW_PRINTK-config-option/20200624-164815
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e857ce6eae7ca21b2055cca4885545e29228fe2
config: microblaze-randconfig-r026-20200624 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
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
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze

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

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

In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:19,
from ./arch/microblaze/include/generated/asm/bug.h:1,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/ring_buffer.h:5,
from kernel/trace/ring_buffer_benchmark.c:7:
kernel/trace/ring_buffer_benchmark.c: In function 'ring_buffer_producer':
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer_benchmark.c:245:2: note: in expansion of macro 'trace_printk'
245 | trace_printk("Starting ring buffer hammer\n");
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:284:2: note: in expansion of macro 'trace_printk'
284 | trace_printk("End ring buffer hammer\n");
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:303:3: note: in expansion of macro 'trace_printk'
303 | trace_printk("ERROR!\n");
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:307:4: note: in expansion of macro 'trace_printk'
307 | trace_printk("Running Consumer at nice: %d\n",
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:310:4: note: in expansion of macro 'trace_printk'
310 | trace_printk("Running Consumer at SCHED_FIFO %d\n",
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:314:3: note: in expansion of macro 'trace_printk'
314 | trace_printk("Running Producer at nice: %d\n",
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:317:3: note: in expansion of macro 'trace_printk'
317 | trace_printk("Running Producer at SCHED_FIFO %d\n",
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:323:3: note: in expansion of macro 'trace_printk'
323 | trace_printk("WARNING!!! This test is running at lowest priority.\n");
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
>> include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:325:2: note: in expansion of macro 'trace_printk'
325 | trace_printk("Time: %lld (usecs)\n", time);
| ^~~~~~~~~~~~
>> include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:326:2: note: in expansion of macro 'trace_printk'
326 | trace_printk("Overruns: %lld\n", overruns);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:328:3: note: in expansion of macro 'trace_printk'
328 | trace_printk("Read: (reader disabled)\n");
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:330:3: note: in expansion of macro 'trace_printk'
330 | trace_printk("Read: %ld (by %s)\n", read,
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:332:2: note: in expansion of macro 'trace_printk'
332 | trace_printk("Entries: %lld\n", entries);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:333:2: note: in expansion of macro 'trace_printk'
333 | trace_printk("Total: %lld\n", entries + overruns + read);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:334:2: note: in expansion of macro 'trace_printk'
334 | trace_printk("Missed: %ld\n", missed);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:335:2: note: in expansion of macro 'trace_printk'
335 | trace_printk("Hit: %ld\n", hit);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:342:3: note: in expansion of macro 'trace_printk'
342 | trace_printk("TIME IS ZERO??\n");
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:344:2: note: in expansion of macro 'trace_printk'
344 | trace_printk("Entries per millisec: %ld\n", hit);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:349:3: note: in expansion of macro 'trace_printk'
349 | trace_printk("%ld ns per entry\n", avg);
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~~~~~~~~~~~
include/linux/kernel.h:725:2: note: in expansion of macro '__static_assert'
725 | __static_assert( \
| ^~~~~~~~~~~~~~~
kernel/trace/ring_buffer_benchmark.c:356:3: note: in expansion of macro 'trace_printk'
356 | trace_printk("Total iterations per millisec: %ld\n",
| ^~~~~~~~~~~~
include/linux/build_bug.h:78:41: error: static assertion failed: "trace_printk called, please enable CONFIG_TRACING_ALLOW_PRINTK."
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)

vim +78 include/linux/build_bug.h

bc6245e5efd70c Ian Abbott 2017-07-10 60
6bab69c65013be Rasmus Villemoes 2019-03-07 61 /**
6bab69c65013be Rasmus Villemoes 2019-03-07 62 * static_assert - check integer constant expression at build time
6bab69c65013be Rasmus Villemoes 2019-03-07 63 *
6bab69c65013be Rasmus Villemoes 2019-03-07 64 * static_assert() is a wrapper for the C11 _Static_assert, with a
6bab69c65013be Rasmus Villemoes 2019-03-07 65 * little macro magic to make the message optional (defaulting to the
6bab69c65013be Rasmus Villemoes 2019-03-07 66 * stringification of the tested expression).
6bab69c65013be Rasmus Villemoes 2019-03-07 67 *
6bab69c65013be Rasmus Villemoes 2019-03-07 68 * Contrary to BUILD_BUG_ON(), static_assert() can be used at global
6bab69c65013be Rasmus Villemoes 2019-03-07 69 * scope, but requires the expression to be an integer constant
6bab69c65013be Rasmus Villemoes 2019-03-07 70 * expression (i.e., it is not enough that __builtin_constant_p() is
6bab69c65013be Rasmus Villemoes 2019-03-07 71 * true for expr).
6bab69c65013be Rasmus Villemoes 2019-03-07 72 *
6bab69c65013be Rasmus Villemoes 2019-03-07 73 * Also note that BUILD_BUG_ON() fails the build if the condition is
6bab69c65013be Rasmus Villemoes 2019-03-07 74 * true, while static_assert() fails the build if the expression is
6bab69c65013be Rasmus Villemoes 2019-03-07 75 * false.
6bab69c65013be Rasmus Villemoes 2019-03-07 76 */
6bab69c65013be Rasmus Villemoes 2019-03-07 77 #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
6bab69c65013be Rasmus Villemoes 2019-03-07 @78 #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
6bab69c65013be Rasmus Villemoes 2019-03-07 79

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