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| author |   Eugene Syromiatnikov <esyr@redhat.com> | 2021-08-25 19:06:13 +0200 |
|---|---|---|
| committer |   Christian Brauner <christian.brauner@ubuntu.com> | 2021-09-29 13:00:05 +0200 |
| commit | 61bc346ce64a3864ac55f5d18bdc1572cda4fb18 (patch) | |
| tree | 8831e8255d83b58f047a7cae374fc1ab089b68b1 /kernel/sched/core_sched.c | |
| parent | Linux 5.15-rc3 (diff) | |
| download | linux-dev-61bc346ce64a3864ac55f5d18bdc1572cda4fb18.tar.xz linux-dev-61bc346ce64a3864ac55f5d18bdc1572cda4fb18.zip | |
uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument
Commit 7ac592aa35a684ff ("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: 7ac592aa35a684ff ("sched: prctl() core-scheduling interface")
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'kernel/sched/core_sched.c')
| -rw-r--r-- | kernel/sched/core_sched.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched/core_sched.c b/kernel/sched/core_sched.c index 9a80e9a474c0..20f640949450 100644 --- a/kernel/sched/core_sched.c +++ b/kernel/sched/core_sched.c @@ -134,6 +134,10 @@ int sched_core_share_pid(unsigned int cmd, pid_t pid, enum pid_type type, if (!static_branch_likely(&sched_smt_present)) return -ENODEV; + BUILD_BUG_ON(PR_SCHED_CORE_SCOPE_THREAD != PIDTYPE_PID); + BUILD_BUG_ON(PR_SCHED_CORE_SCOPE_THREAD_GROUP != PIDTYPE_TGID); + BUILD_BUG_ON(PR_SCHED_CORE_SCOPE_PROCESS_GROUP != PIDTYPE_PGID); + if (type > PIDTYPE_PGID || cmd >= PR_SCHED_CORE_MAX || pid < 0 || (cmd != PR_SCHED_CORE_GET && uaddr)) return -EINVAL; |