sched: Update kerneldoc for sched_rr_get_interval()

[Jonathan Corbet]

Commit abca5fc535a3e ("sched_rr_get_interval(): move compat to native, get
rid of set_fs()") changed the prototype of that function but left the
kerneldoc comments unchanged, leading to these docs-build warnings:

  ./kernel/sched/core.c:5113: warning: No description found for parameter 't'
  ./kernel/sched/core.c:5113: warning: Excess function parameter 'interval'
  			      description in 'sched_rr_get_interval'

Update the documentation (noting that it's not a user-space address
anymore) and make the docs build a little quieter.

Signed-off-by: Jonathan Corbet <corbet@xxxxxxx>
---
 kernel/sched/core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 75554f366fd3..a6e9edb55333 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5100,12 +5100,12 @@ SYSCALL_DEFINE1(sched_get_priority_min, int, policy)
 /**
  * sys_sched_rr_get_interval - return the default timeslice of a process.
  * @pid: pid of the process.
- * @interval: userspace pointer to the timeslice value.
+ * @t: pointer to the timeslice value.
  *
  * this syscall writes the default timeslice value of a given process
- * into the user-space timespec buffer. A value of '0' means infinity.
+ * into the timespec64 buffer. A value of '0' means infinity.
  *
- * Return: On success, 0 and the timeslice is in @interval. Otherwise,
+ * Return: On success, 0 and the timeslice is in @t. Otherwise,
  * an error code.
  */
 static int sched_rr_get_interval(pid_t pid, struct timespec64 *t)
-- 
2.14.3