tree 45b8497556dff1a90311bbd087f34ff4791be9d6
parent e38a517578d6c0f764b0d0f6e26dcdf9f70c69d7
author Will Deacon <will.deacon@arm.com> 1365437592 +0100
committer Will Deacon <will.deacon@arm.com> 1369926154 +0100

ARM: elf: add new hwcap for identifying atomic ldrd/strd instructions

CPUs implementing LPAE have atomic ldrd/strd instructions, meaning that
userspace software can avoid having to use the exclusive variants of
these instructions if they wish.

This patch advertises the atomicity of these instructions via the
hwcaps, so userspace can detect this CPU feature.

Reported-by: Vladimir Danushevsky <vladimir.danushevsky@oracle.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>