[PATCH 3.16.y-ckt 068/126] ARC: dw2 unwind: Remove falllback linear search thru FDE entries

3.16.7-ckt22 -stable review patch. If anyone has any objections, please let me know. -- From: Vineet Gupta commit 2e22502c080f27afeab5e6f11e618fb7bc7aea53 upstream. Fixes STAR 9000953410: "perf callgraph profiling causing RCU stalls" | perf record -g -c 15000 -e cycles

[PATCH 3.16.y-ckt 068/126] ARC: dw2 unwind: Remove falllback linear search thru FDE entries

3.16.7-ckt22 -stable review patch. If anyone has any objections, please let me know. -- From: Vineet Gupta commit 2e22502c080f27afeab5e6f11e618fb7bc7aea53 upstream. Fixes STAR 9000953410: "perf callgraph profiling causing RCU stalls" | perf record -g -c