Re: [PATCH v2 2/8] arm64: vdso: Introduce asm/vdso/mman.h

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Le 23/09/2024 à 16:19, Vincenzo Frascino a écrit :
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@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
---
  arch/arm64/include/asm/vdso/mman.h | 15 +++++++++++++++
  1 file changed, 15 insertions(+)
  create mode 100644 arch/arm64/include/asm/vdso/mman.h

diff --git a/arch/arm64/include/asm/vdso/mman.h b/arch/arm64/include/asm/vdso/mman.h
new file mode 100644
index 000000000000..4c936c9d11ab
--- /dev/null
+++ b/arch/arm64/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
+

Same comment here as for x86, the flags are the same on all archictures, no need for such an indirection which makes the code less readable.

Christophe




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