kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/kernel/fork.c
..
..
@@ -42,7 +42,6 @@
42
42
 #include <linux/mmu_notifier.h>
43
43
 #include <linux/fs.h>
44
44
 #include <linux/mm.h>
45
-#include <linux/kprobes.h>
46
45
 #include <linux/vmacache.h>
47
46
 #include <linux/nsproxy.h>
48
47
 #include <linux/capability.h>
..
..
@@ -295,7 +294,7 @@
295
294
 			return;
296
295
 		}
297
296
 
298
-		vfree(tsk->stack);
297
+		vfree_atomic(tsk->stack);
299
298
 		return;
300
299
 	}
301
300
 #endif
..
..
@@ -724,19 +723,6 @@
724
723
 }
725
724
 EXPORT_SYMBOL_GPL(__mmdrop);
726
725
 
727
-#ifdef CONFIG_PREEMPT_RT
728
-/*
729
- * RCU callback for delayed mm drop. Not strictly rcu, but we don't
730
- * want another facility to make this work.
731
- */
732
-void __mmdrop_delayed(struct rcu_head *rhp)
733
-{
734
-	struct mm_struct *mm = container_of(rhp, struct mm_struct, delayed_drop);
735
-
736
-	__mmdrop(mm);
737
-}
738
-#endif
739
-
740
726
 static void mmdrop_async_fn(struct work_struct *work)
741
727
 {
742
728
 	struct mm_struct *mm;
..
..
@@ -777,15 +763,6 @@
777
763
 	WARN_ON(!tsk->exit_state);
778
764
 	WARN_ON(refcount_read(&tsk->usage));
779
765
 	WARN_ON(tsk == current);
780
-
781
-	/*
782
-	 * Remove function-return probe instances associated with this
783
-	 * task and put them back on the free list.
784
-	 */
785
-	kprobe_flush_task(tsk);
786
-
787
-	/* Task is done with its stack. */
788
-	put_task_stack(tsk);
789
766
 
790
767
 	io_uring_free(tsk);
791
768
 	cgroup_free(tsk);
..
..
@@ -984,13 +961,11 @@
984
961
 	tsk->splice_pipe = NULL;
985
962
 	tsk->task_frag.page = NULL;
986
963
 	tsk->wake_q.next = NULL;
987
-	tsk->wake_q_sleeper.next = NULL;
988
964
 	tsk->pf_io_worker = NULL;
989
965
 
990
966
 	account_kernel_stack(tsk, 1);
991
967
 
992
968
 	kcov_task_init(tsk);
993
-	kmap_local_fork(tsk);
994
969
 
995
970
 #ifdef CONFIG_FAULT_INJECTION
996
971
 	tsk->fail_nth = 0;
..
..
@@ -2084,7 +2059,6 @@
2084
2059
 	spin_lock_init(&p->alloc_lock);
2085
2060
 
2086
2061
 	init_sigpending(&p->pending);
2087
-	p->sigqueue_cache = NULL;
2088
2062
 
2089
2063
 	p->utime = p->stime = p->gtime = 0;
2090
2064
 #ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME