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(parent: 0ddd12e) | patch
arm64: vdso: put vdso datapage in a separate vma
authorWill Deacon <will.deacon@arm.com>
Wed, 9 Jul 2014 18:22:11 +0000 (19:22 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Thu, 17 Jul 2014 15:18:36 +0000 (16:18 +0100)
commitbc7b40f9f28e3166c9c123770808a47c44e6755b
tree1d947307eead93e8b35664360c21f232e7e36ddbtree | snapshot
parent0ddd12ec4ebf180ed5ce3e379ac2c82ab5b41c59commit | diff
arm64: vdso: put vdso datapage in a separate vma

The VDSO datapage doesn't need to be executable (no code there) or
CoW-able (the kernel writes the page, so a private copy is totally
useless).

This patch moves the datapage into its own VMA, identified as "[vvar]"
in /proc/<pid>/maps.

Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/kernel/vdso.c diff | blob | history
Linux Kernel Source Tree.