Hi, There is a code generation bug in GCC 5.1 that affects some ARM kernels: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932 The bug report mentions arm926ej-s, and also some OMAP1 and 2 kernels fail to boot (there is a crash after warnings about some bogus duplicate sysfs files) unless they are compiled with -fno-ipa-sra. A.