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Sat, 14 Nov 2026 08:56:34 -0800 (PST) Received: from SafoStation ([31.40.65.49]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5c1712dad26sm1792051e87.8.2026.11.14.08.56.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2026 08:56:33 -0800 (PST) From: Safocl Stollmannovic To: Michal Simek Cc: linux-kernel@vger.kernel.org Subject: [PATCH v3 03/14] microblaze: fix duplicate extern declarations Date: Sat, 14 Nov 2026 20:55:43 +0400 Message-ID: <20261114165612.368785-4-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 --- arch/microblaze/include/asm/entry.h | 2 +- arch/microblaze/kernel/microblaze_ksyms.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h index 05acf4d7b..f3e4a6eaa 100644 --- a/arch/microblaze/include/asm/entry.h +++ b/arch/microblaze/include/asm/entry.h @@ -41,7 +41,7 @@ DECLARE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ -extern asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall); +asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall); # endif /* __ASSEMBLER__ */ #endif /* _ASM_MICROBLAZE_ENTRY_H */ diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c index ad7596d7b..40915d400 100644 --- a/arch/microblaze/kernel/microblaze_ksyms.c +++ b/arch/microblaze/kernel/microblaze_ksyms.c @@ -51,6 +51,6 @@ extern void xmb_manager_register(uintptr_t phys_baseaddr, u32 cr_val, void (*callback)(void *data), void *priv, void (*reset_callback)(void *data)); EXPORT_SYMBOL(xmb_manager_register); -extern asmlinkage void xmb_inject_err(void); +asmlinkage void xmb_inject_err(void); EXPORT_SYMBOL(xmb_inject_err); #endif -- 2.56.1