rk3568 rt init

hc

2023-11-06 e3e12f52b214121840b44c91de5b3e5af5d3eb84

 kernel/mm/vmstat.c
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@@ -320,6 +320,7 @@
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 	long x;
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 	long t;
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+	preempt_disable_rt();
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 	x = delta + __this_cpu_read(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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@@ -329,6 +330,7 @@
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 		x = 0;
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 	}
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 	__this_cpu_write(*p, x);
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+	preempt_enable_rt();
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 }
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 EXPORT_SYMBOL(__mod_zone_page_state);
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@@ -340,6 +342,7 @@
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 	long x;
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 	long t;
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+	preempt_disable_rt();
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 	x = delta + __this_cpu_read(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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@@ -349,6 +352,7 @@
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 		x = 0;
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 	}
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 	__this_cpu_write(*p, x);
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+	preempt_enable_rt();
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 }
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 EXPORT_SYMBOL(__mod_node_page_state);
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@@ -381,6 +385,7 @@
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 	s8 __percpu *p = pcp->vm_stat_diff + item;
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 	s8 v, t;
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+	preempt_disable_rt();
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 	v = __this_cpu_inc_return(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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 	if (unlikely(v > t)) {
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@@ -389,6 +394,7 @@
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 		zone_page_state_add(v + overstep, zone, item);
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 		__this_cpu_write(*p, -overstep);
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 	}
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+	preempt_enable_rt();
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 }
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 void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
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@@ -397,6 +403,7 @@
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 	s8 __percpu *p = pcp->vm_node_stat_diff + item;
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 	s8 v, t;
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+	preempt_disable_rt();
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 	v = __this_cpu_inc_return(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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 	if (unlikely(v > t)) {
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@@ -405,6 +412,7 @@
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 		node_page_state_add(v + overstep, pgdat, item);
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 		__this_cpu_write(*p, -overstep);
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 	}
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+	preempt_enable_rt();
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 }
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 void __inc_zone_page_state(struct page *page, enum zone_stat_item item)
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@@ -425,6 +433,7 @@
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 	s8 __percpu *p = pcp->vm_stat_diff + item;
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 	s8 v, t;
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+	preempt_disable_rt();
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 	v = __this_cpu_dec_return(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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 	if (unlikely(v < - t)) {
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@@ -433,6 +442,7 @@
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 		zone_page_state_add(v - overstep, zone, item);
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 		__this_cpu_write(*p, overstep);
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 	}
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+	preempt_enable_rt();
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 }
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 void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
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@@ -441,6 +451,7 @@
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 	s8 __percpu *p = pcp->vm_node_stat_diff + item;
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 	s8 v, t;
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+	preempt_disable_rt();
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 	v = __this_cpu_dec_return(*p);
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 	t = __this_cpu_read(pcp->stat_threshold);
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 	if (unlikely(v < - t)) {
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@@ -449,6 +460,7 @@
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 		node_page_state_add(v - overstep, pgdat, item);
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 		__this_cpu_write(*p, overstep);
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 	}
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+	preempt_enable_rt();
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 }
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 void __dec_zone_page_state(struct page *page, enum zone_stat_item item)