[PATCH 1/9] x86: vdso: Introduce asm/vdso/mman.h

Vincenzo Frascino
2024-09-03T15:14:58Z

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

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

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
arch/x86/include/asm/vdso/mman.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
create mode 100644 arch/x86/include/asm/vdso/mman.h

diff --git a/arch/x86/include/asm/vdso/mman.h b/arch/x86/include/asm/vdso/mman.h
new file mode 100644
index 000000000000..4c936c9d11ab
--- /dev/null
+++ b/arch/x86/include/asm/vdso/mman.h
@@ -0,0 +1,15 @@
+
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VDSO_MMAN_H
+#define __ASM_VDSO_MMAN_H
+
+#ifndef __ASSEMBLY__
+
+#include <uapi/linux/mman.h>
+
+#define VDSO_MMAP_PROT PROT_READ | PROT_WRITE
+#define VDSO_MMAP_FLAGS MAP_DROPPABLE | MAP_ANONYMOUS
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_MMAN_H */
--
2.34.1