tree 310800b1a6ad447f697f1dccd12d3e6cf11179cf
parent 029baf14a027a44b3ac8a9fe5cb1e516cbb9007e
author Will Deacon <will.deacon@arm.com> 1364466303 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1365004800 +0100

ARM: 7687/1: atomics: don't use exclusives for atomic64 read/set with LPAE

To ease page table updates with 64-bit descriptors, CPUs implementing
LPAE are required to implement ldrd/strd as atomic operations.

This patch uses these accessors instead of the exclusive variants when
performing atomic64_{read,set} on LPAE systems.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>