[Bug runtime/32904] runtime/linux/stap-hw-breakpoint.h does not compile with linux 6.15 on x86_64

[wcohen at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32904

William Cohen <wcohen at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |agentzh at gmail dot com

--- Comment #1 from William Cohen <wcohen at redhat dot com> ---
This looks to be related to systemtap git commits:

03c35e2212 (Yichun Zhang (agentzh) 2023-12-16 20:49:46 -0800
afb26217f5 (Yichun Zhang (agentzh) 2023-12-16 22:21:27 -0800

Linux 6.15 does more checking for the x86_64 processor than for other
architectures and the modules using this header do not compile.  I attempted to
do some casting to convert the void * pointer into "struct perf_event *
__percpu *".  However the kernel check do not appear to allow such casting.  A
possible approach might be to have the ret_array be a union of the appropriate
types to be compatible with the checks.

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