linux-kernel - WARNING: modpost: EXPORT symbol "…" [vmlinux] version generation failed, symbol will not be versioned./"…" […] has no CRC!

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Message-ID: <eb3c109f-550f-44ce-b0a1-3837aef1d02a@molgen.mpg.de>
Date: Sat, 5 Apr 2025 11:00:17 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Uros Bizjak <ubizjak@...il.com>, Andrew Morton <akpm@...ux-foundation.org>
Cc: regressions@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>
Subject: WARNING: modpost: EXPORT symbol "…" [vmlinux] version generation failed, symbol will not be versioned./"…" […] has no CRC!

#regzbot introduced: 6a367577153acd9b432a5340fb10891eeb7e10f1


Dear Linux folks,


If I didn’t screw up `git bisect`, then commit 6a367577153a (percpu/x86: 
enable strict percpu checks via named AS qualifiers) [1] causes the 
build warnings below:

     $ make olddefconfig && make -j128
     […]
     WARNING: modpost: EXPORT symbol "xen_vcpu_id" [vmlinux] version 
generation failed, symbol will not be versioned.
     Is "xen_vcpu_id" prototyped in <asm/asm-prototypes.h>?
     WARNING: modpost: EXPORT symbol "irq_stat" [vmlinux] version 
generation failed, symbol will not be versioned.
     Is "irq_stat" prototyped in <asm/asm-prototypes.h>?
     […]
     WARNING: modpost: EXPORT symbol "__irq_regs" [vmlinux] version 
generation failed, symbol will not be versioned.
     Is "__irq_regs" prototyped in <asm/asm-prototypes.h>?
     WARNING: modpost: EXPORT symbol "radix_tree_preloads" [vmlinux] 
version generation failed, symbol will not be versioned.
     Is "radix_tree_preloads" prototyped in <asm/asm-prototypes.h>?
     WARNING: modpost: "pcpu_hot" 
[arch/x86/events/intel/intel-uncore.ko] has no CRC!
     WARNING: modpost: "numa_node" 
[arch/x86/events/intel/intel-uncore.ko] has no CRC!
     […]


Kind regards,

Paul


[1]: 
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6a367577153acd9b432a5340fb10891eeb7e10f1
[2]: https://bugzilla.kernel.org/show_bug.cgi?id=219966