linux-kernel - [PATCH 09/16] ARM: cacheflush: avoid __flush_anon

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Message-Id: <20230516154605.517690-10-arnd@kernel.org>
Date:   Tue, 16 May 2023 17:45:58 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Russell King <linux@...linux.org.uk>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Oleg Nesterov <oleg@...hat.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>,
        Linus Walleij <linus.walleij@...aro.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH 09/16] ARM: cacheflush: avoid __flush_anon_page() missing-prototype warning

From: Arnd Bergmann <arnd@...db.de>

The prototype for __flush_anon_page() is intentionally hidden
inside the flush_anon_page() inline function to prevent it from
being called from drivers.

When building with 'W=1', this causes a warning:

arch/arm/mm/flush.c:358:6: error: no previous prototype for '__flush_anon_page' [-Werror=missing-prototypes]

Work around this by adding a prototype directly next to the function
definition.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/mm/flush.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 9b112009c708..43678137a9b2 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -355,6 +355,7 @@ EXPORT_SYMBOL(flush_dcache_page);
  *  memcpy() to/from page
  *  if written to page, flush_dcache_page()
  */
+void __flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr);
 void __flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
 {
 	unsigned long pfn;
-- 
2.39.2