Drivers may wish to limit their own cgroup operations to cgroups in the cgroup-v2 hierarchy. Let's make this helper function usable outside the cgroup core code. Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: cgroups@xxxxxxxxxxxxxxx Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx> --- include/linux/cgroup.h | 2 ++ kernel/cgroup/cgroup-internal.h | 1 - kernel/cgroup/cgroup.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index c9896027ed99..1c1758ac1a97 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -656,6 +656,8 @@ static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp) void cgroup_path_from_kernfs_id(const union kernfs_node_id *id, char *buf, size_t buflen); +bool cgroup_on_dfl(const struct cgroup *cgrp); + #else /* !CONFIG_CGROUPS */ struct cgroup_subsys_state; diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index b928b27050c6..7338083ee3bc 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -156,7 +156,6 @@ static inline void get_css_set(struct css_set *cset) } bool cgroup_ssid_enabled(int ssid); -bool cgroup_on_dfl(const struct cgroup *cgrp); bool cgroup_is_thread_root(struct cgroup *cgrp); bool cgroup_is_threaded(struct cgroup *cgrp); diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index f12c32c6ec7f..6069191653f8 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -298,6 +298,7 @@ bool cgroup_on_dfl(const struct cgroup *cgrp) { return cgrp->root == &cgrp_dfl_root; } +EXPORT_SYMBOL(cgroup_on_dfl); /* IDR wrappers which synchronize using cgroup_idr_lock */ static int cgroup_idr_alloc(struct idr *idr, void *ptr, int start, int end, -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html