From: Matthew Leach <matthew.leach@arm.com>
Date: Fri, 11 Oct 2013 13:52:13 +0000 (+0100)
Subject: arm64: compat: correct register concatenation for syscall wrappers
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~54^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55b89540b0d8d031f90e3d711ec0df3f797ecc61;p=pandora-kernel.git

arm64: compat: correct register concatenation for syscall wrappers

The arm64 port contains wrappers for arm32 syscalls that pass 64-bit
values. These wrappers concatenate the two registers to hold a 64-bit
value in a single X register. On BE, however, the lower and higher
words are swapped.

Create a new assembler macro, regs_to_64, that when on BE systems
swaps the registers in the orr instruction.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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