[PATCH 4.2 029/134] arm64: flush FP/SIMD state correctly after execve()

4.2-stable review patch. If anyone has any objections, please let me know. -- From: Ard Biesheuvel commit 674c242c9323d3c293fc4f9a3a3a619fe3063290 upstream. When a task calls execve(), its FP/SIMD state is flushed so that none of the original program state is observeable by

[PATCH 4.2 029/134] arm64: flush FP/SIMD state correctly after execve()

4.2-stable review patch. If anyone has any objections, please let me know. -- From: Ard Biesheuvel commit 674c242c9323d3c293fc4f9a3a3a619fe3063290 upstream. When a task calls execve(), its FP/SIMD state is flushed so that none of the original