修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/include/linux/list_bl.h
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@@ -3,7 +3,6 @@
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 #define _LINUX_LIST_BL_H
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 #include <linux/list.h>
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-#include <linux/spinlock.h>
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 #include <linux/bit_spinlock.h>
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 /*
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@@ -34,24 +33,13 @@
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 struct hlist_bl_head {
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 	struct hlist_bl_node *first;
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-#ifdef CONFIG_PREEMPT_RT_BASE
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-	raw_spinlock_t lock;
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-#endif
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 };
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 struct hlist_bl_node {
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 	struct hlist_bl_node *next, **pprev;
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 };
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-
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-#ifdef CONFIG_PREEMPT_RT_BASE
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-#define INIT_HLIST_BL_HEAD(h)		\
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-do {					\
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-	(h)->first = NULL;		\
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-	raw_spin_lock_init(&(h)->lock);	\
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-} while (0)
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-#else
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-#define INIT_HLIST_BL_HEAD(h) (h)->first = NULL
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-#endif
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+#define INIT_HLIST_BL_HEAD(ptr) \
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+	((ptr)->first = NULL)
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 static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h)
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 {
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@@ -98,6 +86,32 @@
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 	hlist_bl_set_first(h, n);
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 }
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+static inline void hlist_bl_add_before(struct hlist_bl_node *n,
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+				       struct hlist_bl_node *next)
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+{
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+	struct hlist_bl_node **pprev = next->pprev;
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+
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+	n->pprev = pprev;
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+	n->next = next;
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+	next->pprev = &n->next;
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+
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+	/* pprev may be `first`, so be careful not to lose the lock bit */
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+	WRITE_ONCE(*pprev,
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+		   (struct hlist_bl_node *)
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+			((uintptr_t)n | ((uintptr_t)*pprev & LIST_BL_LOCKMASK)));
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+}
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+
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+static inline void hlist_bl_add_behind(struct hlist_bl_node *n,
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+				       struct hlist_bl_node *prev)
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+{
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+	n->next = prev->next;
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+	n->pprev = &prev->next;
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+	prev->next = n;
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+
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+	if (n->next)
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+		n->next->pprev = &n->next;
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+}
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+
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 static inline void __hlist_bl_del(struct hlist_bl_node *n)
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 {
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 	struct hlist_bl_node *next = n->next;
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@@ -131,26 +145,12 @@
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 static inline void hlist_bl_lock(struct hlist_bl_head *b)
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 {
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-#ifndef CONFIG_PREEMPT_RT_BASE
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 	bit_spin_lock(0, (unsigned long *)b);
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-#else
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-	raw_spin_lock(&b->lock);
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-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
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-	__set_bit(0, (unsigned long *)b);
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-#endif
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-#endif
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 }
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 static inline void hlist_bl_unlock(struct hlist_bl_head *b)
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 {
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-#ifndef CONFIG_PREEMPT_RT_BASE
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 	__bit_spin_unlock(0, (unsigned long *)b);
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-#else
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-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
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-	__clear_bit(0, (unsigned long *)b);
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-#endif
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-	raw_spin_unlock(&b->lock);
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-#endif
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 }
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 static inline bool hlist_bl_is_locked(struct hlist_bl_head *b)