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Sat, 14 Nov 2026 08:57:14 -0800 (PST) Received: from SafoStation ([31.40.65.49]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5c1712dad26sm1792051e87.8.2026.11.14.08.57.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2026 08:57:14 -0800 (PST) From: Safocl Stollmannovic To: "Rafael J. Wysocki" , Pavel Machek , Len Brown Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v3 14/14] suspend: fix duplicate extern declarations Date: Sat, 14 Nov 2026 20:55:54 +0400 Message-ID: <20261114165612.368785-15-safocl88@gmail.com> X-Mailer: git-send-email 2.56.1 In-Reply-To: <20261114165612.368785-1-safocl88@gmail.com> References: <20261114165612.368785-1-safocl88@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Compiling a kernel module with a C++ compiler results in a "duplicate extern specifier" error. This occurs because the code contains `extern asmlinkage`, and `asmlinkage` expands to `extern C` when processed by a C++ compiler. Since the code already contains sections that respond to a C++ compiler, I believe it is a perfectly valid approach to gradually move toward a state where kernel modules can be compiled by a C++ compiler without any issues. The `extern` specifier must be removed. Link: https://bugzilla.kernel.org/show_bug.cgi?id=222257 Signed-off-by: Safocl Stollmannovic --- include/linux/suspend.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/suspend.h b/include/linux/suspend.h index a38150277..b97af3420 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -385,8 +385,8 @@ extern int swsusp_page_is_forbidden(struct page *); extern void swsusp_set_page_free(struct page *); extern void swsusp_unset_page_free(struct page *); extern unsigned long get_safe_page(gfp_t gfp_mask); -extern asmlinkage int swsusp_arch_suspend(void); -extern asmlinkage int swsusp_arch_resume(void); +asmlinkage int swsusp_arch_suspend(void); +asmlinkage int swsusp_arch_resume(void); extern u32 swsusp_hardware_signature; extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); -- 2.56.1