https://github.com/androidarmv6/android_kernel_lge_msm7x27-3.0.x/commit/02f57f590b0aa76192c98056a51a31d5336582c1
 Switch remote spinlock to ldrex algorithm

Warning: swp{b} use is deprecated for this architecture

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dht0008a/index.html

Change-Id: I419b44eadfb34e3619a574ca6ca4869233078b22