Re: [PATCH 1/2] backports: add sched_set_fifo_low

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On 11/12/20 11:35 AM, Felix Fietkau wrote:
It is needed for mt76

Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
  backport/backport-include/linux/sched.h | 19 +++++++++++++++++++
  1 file changed, 19 insertions(+)
  create mode 100644 backport/backport-include/linux/sched.h

diff --git a/backport/backport-include/linux/sched.h b/backport/backport-include/linux/sched.h
new file mode 100644
index 000000000000..be77a8d771ab
--- /dev/null
+++ b/backport/backport-include/linux/sched.h
@@ -0,0 +1,19 @@
+#include_next <linux/sched.h>
+#include <linux/version.h>
+#include <uapi/linux/sched/types.h>
+static inline void sched_set_fifo_low(struct task_struct *p)
+	struct sched_param sparam = {.sched_priority = 1};
+	sched_setscheduler(p, SCHED_FIFO, &sparam);

Hi Felix,

The upstream kernel uses this in sched_set_fifo_low():
   WARN_ON_ONCE(sched_setscheduler_nocheck(p, SCHED_FIFO, &sp) != 0);

Did you change this intentionally?

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