linux-kernel - [PATCH 3/9] x86: vdso: Introduce asm/vdso/page.h

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Message-Id: <20240903151437.1002990-4-vincenzo.frascino@arm.com>
Date: Tue,  3 Sep 2024 16:14:31 +0100
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org,
	linux-mm@...ck.org
Cc: Vincenzo Frascino <vincenzo.frascino@....com>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Jason A . Donenfeld" <Jason@...c4.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Naveen N Rao <naveen@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Theodore Ts'o <tytso@....edu>,
	Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: [PATCH 3/9] x86: vdso: Introduce asm/vdso/page.h

The VDSO implementation includes headers from outside of the
vdso/ namespace.

Introduce asm/vdso/page.h to make sure that the generic library
uses only the allowed namespace.

Cc: Andy Lutomirski <luto@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Jason A. Donenfeld <Jason@...c4.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
---
 arch/x86/include/asm/vdso/page.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 arch/x86/include/asm/vdso/page.h

diff --git a/arch/x86/include/asm/vdso/page.h b/arch/x86/include/asm/vdso/page.h
new file mode 100644
index 000000000000..b0af8fbef27c
--- /dev/null
+++ b/arch/x86/include/asm/vdso/page.h
@@ -0,0 +1,15 @@
+
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VDSO_PAGE_H
+#define __ASM_VDSO_PAGE_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/page_types.h>
+
+#define VDSO_PAGE_MASK	PAGE_MASK
+#define VDSO_PAGE_SIZE	PAGE_SIZE
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_PAGE_H */
-- 
2.34.1