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Message-ID: <20250908120229.7a4e6db9@canb.auug.org.au>
Date: Mon, 8 Sep 2025 12:02:29 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Christian Brauner <brauner@...nel.org>
Cc: Simon Schuster <schuster.simon@...mens-energy.com>, Linux Kernel Mailing
 List <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the vfs-brauner tree

Hi all,

On Thu, 4 Sep 2025 11:33:34 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> 
> After merging the vfs-brauner tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> In file included from include/rv/ltl_monitor.h:11,
>                  from kernel/trace/rv/monitors/sleep/sleep.c:23:
> include/rv/ltl_monitor.h: In function 'ltl_monitor_init':
> include/rv/ltl_monitor.h:75:51: error: passing argument 1 of 'check_trace_callback_type_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/rv/instrumentation.h:18:48: note: in definition of macro 'rv_attach_trace_probe'
>    18 |                 check_trace_callback_type_##tp(rv_handler);                             \
>       |                                                ^~~~~~~~~~
> In file included from kernel/trace/rv/monitors/sleep/sleep.c:3:
> include/linux/tracepoint.h:260:49: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   260 |         check_trace_callback_type_##name(void (*cb)(data_proto))        \
>       |                                          ~~~~~~~^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> In file included from include/asm-generic/bug.h:7,
>                  from arch/x86/include/asm/bug.h:103,
>                  from arch/x86/include/asm/alternative.h:9,
>                  from arch/x86/include/asm/barrier.h:5,
>                  from include/asm-generic/bitops/generic-non-atomic.h:7,
>                  from include/linux/bitops.h:28,
>                  from include/linux/kernel.h:23,
>                  from include/linux/interrupt.h:6,
>                  from include/linux/trace_recursion.h:5,
>                  from include/linux/ftrace.h:10,
>                  from kernel/trace/rv/monitors/sleep/sleep.c:2:
> include/rv/ltl_monitor.h:75:51: error: passing argument 1 of 'register_trace_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/linux/once_lite.h:28:41: note: in definition of macro 'DO_ONCE_LITE_IF'
>    28 |                 bool __ret_do_once = !!(condition);                     \
>       |                                         ^~~~~~~~~
> include/rv/instrumentation.h:19:17: note: in expansion of macro 'WARN_ONCE'
>    19 |                 WARN_ONCE(register_trace_##tp(rv_handler, NULL),                        \
>       |                 ^~~~~~~~~
> include/rv/ltl_monitor.h:75:9: note: in expansion of macro 'rv_attach_trace_probe'
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |         ^~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:241:38: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   241 |         register_trace_##name(void (*probe)(data_proto), void *data)    \
>       |                               ~~~~~~~^~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> include/rv/ltl_monitor.h: In function 'ltl_monitor_destroy':
> include/rv/ltl_monitor.h:92:51: error: passing argument 1 of 'unregister_trace_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    92 |         rv_detach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/rv/instrumentation.h:28:39: note: in definition of macro 'rv_detach_trace_probe'
>    28 |                 unregister_trace_##tp(rv_handler, NULL);                                \
>       |                                       ^~~~~~~~~~
> include/linux/tracepoint.h:254:40: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   254 |         unregister_trace_##name(void (*probe)(data_proto), void *data)  \
>       |                                 ~~~~~~~^~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> In file included from include/rv/ltl_monitor.h:11,
>                  from kernel/trace/rv/monitors/pagefault/pagefault.c:19:
> include/rv/ltl_monitor.h: In function 'ltl_monitor_init':
> include/rv/ltl_monitor.h:75:51: error: passing argument 1 of 'check_trace_callback_type_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/rv/instrumentation.h:18:48: note: in definition of macro 'rv_attach_trace_probe'
>    18 |                 check_trace_callback_type_##tp(rv_handler);                             \
>       |                                                ^~~~~~~~~~
> In file included from kernel/trace/rv/monitors/pagefault/pagefault.c:9:
> include/linux/tracepoint.h:260:49: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   260 |         check_trace_callback_type_##name(void (*cb)(data_proto))        \
>       |                                          ~~~~~~~^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> In file included from include/asm-generic/bug.h:7,
>                  from arch/x86/include/asm/bug.h:103,
>                  from arch/x86/include/asm/alternative.h:9,
>                  from arch/x86/include/asm/barrier.h:5,
>                  from include/asm-generic/bitops/generic-non-atomic.h:7,
>                  from include/linux/bitops.h:28,
>                  from include/linux/kernel.h:23,
>                  from include/linux/interrupt.h:6,
>                  from include/linux/trace_recursion.h:5,
>                  from include/linux/ftrace.h:10,
>                  from kernel/trace/rv/monitors/pagefault/pagefault.c:2:
> include/rv/ltl_monitor.h:75:51: error: passing argument 1 of 'register_trace_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/linux/once_lite.h:28:41: note: in definition of macro 'DO_ONCE_LITE_IF'
>    28 |                 bool __ret_do_once = !!(condition);                     \
>       |                                         ^~~~~~~~~
> include/rv/instrumentation.h:19:17: note: in expansion of macro 'WARN_ONCE'
>    19 |                 WARN_ONCE(register_trace_##tp(rv_handler, NULL),                        \
>       |                 ^~~~~~~~~
> include/rv/ltl_monitor.h:75:9: note: in expansion of macro 'rv_attach_trace_probe'
>    75 |         rv_attach_trace_probe(name, task_newtask, handle_task_newtask);
>       |         ^~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:241:38: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   241 |         register_trace_##name(void (*probe)(data_proto), void *data)    \
>       |                               ~~~~~~~^~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> include/rv/ltl_monitor.h: In function 'ltl_monitor_destroy':
> include/rv/ltl_monitor.h:92:51: error: passing argument 1 of 'unregister_trace_task_newtask' from incompatible pointer type [-Wincompatible-pointer-types]
>    92 |         rv_detach_trace_probe(name, task_newtask, handle_task_newtask);
>       |                                                   ^~~~~~~~~~~~~~~~~~~
>       |                                                   |
>       |                                                   void (*)(void *, struct task_struct *, long unsigned int)
> include/rv/instrumentation.h:28:39: note: in definition of macro 'rv_detach_trace_probe'
>    28 |                 unregister_trace_##tp(rv_handler, NULL);                                \
>       |                                       ^~~~~~~~~~
> include/linux/tracepoint.h:254:40: note: expected 'void (*)(void *, struct task_struct *, u64)' {aka 'void (*)(void *, struct task_struct *, long long unsigned int)'} but argument is of type 'void (*)(void *, struct task_struct *, long unsigned int)'
>   254 |         unregister_trace_##name(void (*probe)(data_proto), void *data)  \
>       |                                 ~~~~~~~^~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:270:9: note: in expansion of macro '__DECLARE_TRACE_COMMON'
>   270 |         __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
>       |         ^~~~~~~~~~~~~~~~~~~~~~
> include/linux/tracepoint.h:481:9: note: in expansion of macro '__DECLARE_TRACE'
>   481 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
>       |         ^~~~~~~~~~~~~~~
> include/linux/tracepoint.h:619:9: note: in expansion of macro 'DECLARE_TRACE_EVENT'
>   619 |         DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
>       |         ^~~~~~~~~~~~~~~~~~~
> include/trace/events/task.h:9:1: note: in expansion of macro 'TRACE_EVENT'
>     9 | TRACE_EVENT(task_newtask,
>       | ^~~~~~~~~~~
> 
> Presumably caused by commit
> 
>   edd3cb05c00a ("copy_process: pass clone_flags as u64 across calltree")
> 
> I have used the vfs-brauner tree from next-20250829 for today.

I am still seeing this failure.

-- 
Cheers,
Stephen Rothwell

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