linux-kernel - Re: [PATCH] x86: Fix build warnings about export.h

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Message-ID: <42abc705-bdb5-4be0-9fe7-b49d0a0d9507@linux.microsoft.com>
Date: Thu, 12 Jun 2025 15:27:55 +0530
From: Naman Jain <namjain@...ux.microsoft.com>
To: Zhenghan Cheng <chengzhenghan@...ontech.com>,
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 linux-kbuild@...r.kernel.org, Huacai Chen <chenhuacai@...ngson.cn>,
 Zhenghan Cheng <your_email@...mple.com>
Subject: Re: [PATCH] x86: Fix build warnings about export.h



On 6/12/2025 3:00 PM, Zhenghan Cheng wrote:
> After commit a934a57a42f64a4 ("scripts/misc-check:
> check missing #include <linux/export.h> when W=1")
> and commit 7d95680d64ac8e836c ("scripts/misc-check:
> check unnecessary #include <linux/export.h> when W=1"),
> we get some build warnings with W=1,such as:
> 
> arch/x86/coco/sev/core.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
> arch/x86/crypto/aria_aesni_avx2_glue.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
> arch/x86/kernel/unwind_orc.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
> arch/x86/kvm/hyperv.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing
> arch/x86/events/intel/core.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present
> arch/x86/events/zhaoxin/core.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present
> arch/x86/kernel/crash.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present
> arch/x86/kernel/devicetree.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present
> 
> so fix these build warnings for x86.
> 
> Signed-off-by: "Zhenghan Cheng" <chengzhenghan@...ontech.com>
> Suggested-by: "Huacai Chen" <chenhuacai@...ngson.cn>
> 


Thanks for sharing.

FYI, I sent a patch to fix these warnings in Hyper-V related drivers
here:
https://lore.kernel.org/all/20250611100459.92900-1-namjain@linux.microsoft.com/

Some of the files are common to the ones in your patch.

Regards,
Naman