This patch is in the context of allowing the Coresight h/w trace driver suite to be loaded as modules. Coresight uses find_task_by_vpid when running in direct capture mode (via sysfs) when getting/setting the context ID comparator to trigger on (/sys/bus/coresight/devices/<x>.etm/ctxid_pid).
Cc: Mathieu Poirier <mathieu.poir...@linaro.org> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Oleg Nesterov <o...@redhat.com> Cc: Gargi Sharma <gs051...@gmail.com> Cc: Rik van Riel <r...@redhat.com> Cc: Pavel Tatashin <pasha.tatas...@oracle.com> Cc: Kefeng Wang <wangkefeng.w...@huawei.com> Cc: Kirill Tkhai <ktk...@virtuozzo.com> Cc: Mike Rapoport <r...@linux.vnet.ibm.com> Cc: David Howells <dhowe...@redhat.com> Cc: "Eric W. Biederman" <ebied...@xmission.com> Signed-off-by: Kim Phillips <kim.phill...@arm.com> --- Current CoreSight callsite: https://lxr.missinglinkelectronics.com/linux/include/linux/coresight.h#L285 A quick look didn't find anything, but if Coresight needs to do something differently, please comment. kernel/pid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/pid.c b/kernel/pid.c index 157fe4b19971..92b1b623f3e0 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -342,6 +342,7 @@ struct task_struct *find_task_by_vpid(pid_t vnr) { return find_task_by_pid_ns(vnr, task_active_pid_ns(current)); } +EXPORT_SYMBOL_GPL(find_task_by_vpid); struct task_struct *find_get_task_by_vpid(pid_t nr) { -- 2.17.0
