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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang rGaf64948e2a05 fails to build the arm64 Linux kernel"
href="https://bugs.llvm.org/show_bug.cgi?id=45225">45225</a>
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<th>Summary</th>
<td>clang rGaf64948e2a05 fails to build the arm64 Linux kernel
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>samitolvanen@google.com
</td>
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<th>CC</th>
<td>cameron.mcinally@nyu.edu, diana.picus@linaro.org, efriedma@quicinc.com, graham.hunter@arm.com, htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, ndesaulniers@google.com, neeilans@live.com, rengolin@gmail.com, richard-llvm@metafoo.co.uk, sander.desmalen@arm.com
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<pre>Starting with commit af64948e2a050d1ef3b7fd314ed07b2a2fe402a5
("[SVE][Inline-Asm] Add constraints for SVE ACLE types"), the ToT arm64 Linux
kernel fails to build due to an error in inline assembly:
In file included from kernel/sched/core.c:9:
In file included from kernel/sched/sched.h:5:
In file included from ./include/linux/sched.h:14:
In file included from ./include/linux/pid.h:5:
In file included from ./include/linux/rculist.h:11:
In file included from ./include/linux/rcupdate.h:30:
./arch/arm64/include/asm/processor.h:280:15: error: invalid operand for inline
asm constraint 'p'
asm volatile("prfm pldl1keep, %a0\n" : : "p" (ptr));
^
This can be reproduced by checking out the latest kernel tree and building the
arm64 defconfig with CC=clang. Reverting the commit from clang fixes the issue.</pre>
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