Hi Greg, Please apply the following commit from 4.10 to 4.9.y to fix perf build under certain conditions: commit 7a759cd8e8272ee18922838ee711219c7c796a31 Author: Jiada Wang <jiada_wang@xxxxxxxxxx> Date: Sun Apr 9 20:02:37 2017 -0700 perf tools: Fix build with ARCH=x86_64 With commit: 0a943cb10ce78 (tools build: Add HOSTARCH Makefile variable) when building for ARCH=x86_64, ARCH=x86_64 is passed to perf instead of ARCH=x86, so the perf build process searchs header files from tools/arch/x86_64/include, which doesn't exist. The following build failure is seen: In file included from util/event.c:2:0: tools/include/uapi/linux/mman.h:4:27: fatal error: uapi/asm/mman.h: No such file or directory compilation terminated. Fix this issue by using SRCARCH instead of ARCH in perf, just like the main kernel Makefile and tools/objtool's. Signed-off-by: Jiada Wang <jiada_wang@xxxxxxxxxx> Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> Cc: Jan Stancek <jstancek@xxxxxxxxxx> Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxxxxxxx> Cc: Rui Teng <rui.teng@xxxxxxxxxxxxxxxxxx> Cc: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx> Cc: Wang Nan <wangnan0@xxxxxxxxxx> Fixes: 0a943cb10ce7 ("tools build: Add HOSTARCH Makefile variable") Link: http://lkml.kernel.org/r/1491793357-14977-2-git-send-email-jiada_wang@xxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Thanks.