Hi, In doing my tests last night before sending out my patch series this morning, I found that s390 build didn't work, but it wasn't due to my patches. I removed all my patches and built with latest mainline (which builds fine), and then merged the current tip/perf/core. The result didn't build. I kicked off a ktest git bisect with last night's Linus tree as good, and with the merged in tip/perf/core as bad. It ended up with this patch that broke the build (which looks like a likely suspect). The break is this: LD .tmp_vmlinux1 arch/s390/oprofile/built-in.o: In function `oprofile_arch_exit': (.text+0x3f52): undefined reference to `oprofile_timer_exit' make[1]: *** [.tmp_vmlinux1] Error 1 make: *** [sub-make] Error 2 The patch the bisect found that breaks the build is this: commit 75c43a20b220f885c39ffa7cdbbb1191e257a9a9 Author: Robert Richter <robert.richter@xxxxxxx> Date: Fri Oct 14 15:46:10 2011 +0200 oprofile: Remove exit function for timer mode Remove exit functions by moving init/exit code to oprofile's setup/ shutdown functions. Doing so the oprofile module exit code will be easier and less error-prone. Signed-off-by: Robert Richter <robert.richter@xxxxxxx> -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html