kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/fs/fscache/main.c
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@@ -41,6 +41,8 @@
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 struct workqueue_struct *fscache_object_wq;
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 struct workqueue_struct *fscache_op_wq;
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+DEFINE_PER_CPU(wait_queue_head_t, fscache_object_cong_wait);
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+
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 /* these values serve as lower bounds, will be adjusted in fscache_init() */
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 static unsigned fscache_object_max_active = 4;
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 static unsigned fscache_op_max_active = 2;
..
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@@ -136,6 +138,7 @@
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 static int __init fscache_init(void)
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 {
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 	unsigned int nr_cpus = num_possible_cpus();
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+	unsigned int cpu;
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 	int ret;
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 	fscache_object_max_active =
..
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@@ -158,6 +161,9 @@
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 	if (!fscache_op_wq)
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 		goto error_op_wq;
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+	for_each_possible_cpu(cpu)
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+		init_waitqueue_head(&per_cpu(fscache_object_cong_wait, cpu));
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+
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 	ret = fscache_proc_init();
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 	if (ret < 0)
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 		goto error_proc;