linux-next: build failure after merge of the tip tree

Stephen Rothwell
2017-04-24T03:33:04Z

Hi all,

After merging the tip tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

kernel/tracepoint.c: In function 'tracepoint_remove_func':
kernel/tracepoint.c:253:4: error: implicit declaration of function 'static_key_slow_dec_cpuslocked' [-Werror=implicit-function-declaration]
static_key_slow_dec_cpuslocked(&tp->key);
^

Caused by commit

24db7a671bd5 ("trace/perf: Cure hotplug lock ordering issues")

static_key_slow_dec_cpuslocked() is only defined if HAVE_JUMP_LABEL is
set - which is only defined if defined(CC_HAVE_ASM_GOTO) &&
defined(CONFIG_JUMP_LABEL). CONFIG_JUMP_LABEL is not set for this build.

I wasn't sure if just adding

#define static_key_slow_dec_cpuslocked static_key_slow_dec

in the !HAVE_JUMP_LABEL case in include/linux/jump_label.h would be
sufficient, so I have reverted that commit for today.

--
Cheers,
Stephen Rothwell