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uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument

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Commit 7ac592aa35 ("sched: prctl() core-scheduling interface")
made use of enum pid_type in prctl's arg4; this type and the associated
enumeration definitions are not exposed to userspace.  Christian
has suggested to provide additional macro definitions that convey
the meaning of the type argument more in alignment with its actual
usage, and this patch does exactly that.

Link: https://lore.kernel.org/r/20210825170613.GA3884@asgard.redhat.com
Suggested-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Complements: 7ac592aa35 ("sched: prctl() core-scheduling interface")
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Eugene Syromiatnikov 2021-08-25 19:06:13 +02:00 • committed by Christian Brauner
parent 5816b3e657
commit 61bc346ce6
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GPG key ID: 91C61BC06578DCA2
3 changed files with 10 additions and 2 deletions
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include/uapi/linux/prctl.h
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@ -268,5 +268,8 @@ struct prctl_mm_map {
# define PR_SCHED_CORE_SHARE_TO 2 /* push core_sched cookie to pid */
# define PR_SCHED_CORE_SHARE_FROM 3 /* pull core_sched cookie to pid */
# define PR_SCHED_CORE_MAX 4
# define PR_SCHED_CORE_SCOPE_THREAD 0
# define PR_SCHED_CORE_SCOPE_THREAD_GROUP 1
# define PR_SCHED_CORE_SCOPE_PROCESS_GROUP 2
#endif /* _LINUX_PRCTL_H */