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38ef046544
Pull sched_ext updates from Tejun Heo: - Move C example schedulers back from the external scx repo to tools/sched_ext as the authoritative source. scx_userland and scx_pair are returning while scx_sdt (BPF arena-based task data management) is new. These schedulers will be dropped from the external repo. - Improve error reporting by adding scx_bpf_error() calls when DSQ creation fails across all in-tree schedulers - Avoid redundant irq_work_queue() calls in destroy_dsq() by only queueing when llist_add() indicates an empty list - Fix flaky init_enable_count selftest by properly synchronizing pre-forked children using a pipe instead of sleep() * tag 'sched_ext-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: selftests/sched_ext: Fix init_enable_count flakiness tools/sched_ext: Fix data header access during free in scx_sdt tools/sched_ext: Add error logging for dsq creation failures in remaining schedulers tools/sched_ext: add arena based scheduler tools/sched_ext: add scx_pair scheduler tools/sched_ext: add scx_userland scheduler sched_ext: Add error logging for dsq creation failures sched_ext: Avoid multiple irq_work_queue() calls in destroy_dsq()