arm64: Add COMPAT_HWCAP_LPAE

Commit a469abd0f868 (ARM: elf: add new hwcap for identifying atomic
ldrd/strd instructions) introduces HWCAP_ELF for 32-bit ARM
applications. As LPAE is always present on arm64, report the
corresponding compat HWCAP to user space.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org> # 3.11+
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 831c97fe1ae9..2e17bd3806c8 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -73,7 +73,8 @@ EXPORT_SYMBOL_GPL(elf_hwcap);
                                  COMPAT_HWCAP_FAST_MULT|COMPAT_HWCAP_EDSP|\
                                  COMPAT_HWCAP_TLS|COMPAT_HWCAP_VFP|\
                                  COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
-                                 COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV)
+                                 COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV|\
+                                 COMPAT_HWCAP_LPAE)
 unsigned int compat_elf_hwcap __read_mostly = COMPAT_ELF_HWCAP_DEFAULT;
 unsigned int compat_elf_hwcap2 __read_mostly;
 #endif