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 <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Gargi Sharma <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Pavel Tatashin <[email protected]> Cc: Kefeng Wang <[email protected]> Cc: Kirill Tkhai <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: David Howells <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Signed-off-by: Kim Phillips <[email protected]> --- 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
