From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/include/linux/list_bl.h | 56 ++++++++++++++++++++++++++++----------------------------
1 files changed, 28 insertions(+), 28 deletions(-)
diff --git a/kernel/include/linux/list_bl.h b/kernel/include/linux/list_bl.h
index 0b5de7d..ae1b541 100644
--- a/kernel/include/linux/list_bl.h
+++ b/kernel/include/linux/list_bl.h
@@ -3,7 +3,6 @@
#define _LINUX_LIST_BL_H
#include <linux/list.h>
-#include <linux/spinlock.h>
#include <linux/bit_spinlock.h>
/*
@@ -34,24 +33,13 @@
struct hlist_bl_head {
struct hlist_bl_node *first;
-#ifdef CONFIG_PREEMPT_RT_BASE
- raw_spinlock_t lock;
-#endif
};
struct hlist_bl_node {
struct hlist_bl_node *next, **pprev;
};
-
-#ifdef CONFIG_PREEMPT_RT_BASE
-#define INIT_HLIST_BL_HEAD(h) \
-do { \
- (h)->first = NULL; \
- raw_spin_lock_init(&(h)->lock); \
-} while (0)
-#else
-#define INIT_HLIST_BL_HEAD(h) (h)->first = NULL
-#endif
+#define INIT_HLIST_BL_HEAD(ptr) \
+ ((ptr)->first = NULL)
static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h)
{
@@ -98,6 +86,32 @@
hlist_bl_set_first(h, n);
}
+static inline void hlist_bl_add_before(struct hlist_bl_node *n,
+ struct hlist_bl_node *next)
+{
+ struct hlist_bl_node **pprev = next->pprev;
+
+ n->pprev = pprev;
+ n->next = next;
+ next->pprev = &n->next;
+
+ /* pprev may be `first`, so be careful not to lose the lock bit */
+ WRITE_ONCE(*pprev,
+ (struct hlist_bl_node *)
+ ((uintptr_t)n | ((uintptr_t)*pprev & LIST_BL_LOCKMASK)));
+}
+
+static inline void hlist_bl_add_behind(struct hlist_bl_node *n,
+ struct hlist_bl_node *prev)
+{
+ n->next = prev->next;
+ n->pprev = &prev->next;
+ prev->next = n;
+
+ if (n->next)
+ n->next->pprev = &n->next;
+}
+
static inline void __hlist_bl_del(struct hlist_bl_node *n)
{
struct hlist_bl_node *next = n->next;
@@ -131,26 +145,12 @@
static inline void hlist_bl_lock(struct hlist_bl_head *b)
{
-#ifndef CONFIG_PREEMPT_RT_BASE
bit_spin_lock(0, (unsigned long *)b);
-#else
- raw_spin_lock(&b->lock);
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
- __set_bit(0, (unsigned long *)b);
-#endif
-#endif
}
static inline void hlist_bl_unlock(struct hlist_bl_head *b)
{
-#ifndef CONFIG_PREEMPT_RT_BASE
__bit_spin_unlock(0, (unsigned long *)b);
-#else
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
- __clear_bit(0, (unsigned long *)b);
-#endif
- raw_spin_unlock(&b->lock);
-#endif
}
static inline bool hlist_bl_is_locked(struct hlist_bl_head *b)
--
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