From 890e1df1bec891d9203724541e81f8fbe5183388 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 19 Feb 2024 01:57:06 +0000
Subject: [PATCH] default settings GPIO PA4 PA6 PA3 PB5
---
kernel/include/linux/backing-dev-defs.h | 74 ++++++++++++++++---------------------
1 files changed, 32 insertions(+), 42 deletions(-)
diff --git a/kernel/include/linux/backing-dev-defs.h b/kernel/include/linux/backing-dev-defs.h
index 07e02d6..f3314ad 100644
--- a/kernel/include/linux/backing-dev-defs.h
+++ b/kernel/include/linux/backing-dev-defs.h
@@ -13,6 +13,7 @@
#include <linux/workqueue.h>
#include <linux/kref.h>
#include <linux/refcount.h>
+#include <linux/android_kabi.h>
struct page;
struct device;
@@ -33,8 +34,6 @@
WB_sync_congested, /* The sync queue is getting full */
};
-typedef int (congested_fn)(void *, int);
-
enum wb_stat_item {
WB_RECLAIMABLE,
WB_WRITEBACK,
@@ -54,7 +53,6 @@
WB_REASON_SYNC,
WB_REASON_PERIODIC,
WB_REASON_LAPTOP_TIMER,
- WB_REASON_FREE_MORE_MEM,
WB_REASON_FS_FREE_SPACE,
/*
* There is no bdi forker thread any more and works are done
@@ -63,29 +61,30 @@
* so it has a mismatch name.
*/
WB_REASON_FORKER_THREAD,
+ WB_REASON_FOREIGN_FLUSH,
WB_REASON_MAX,
};
-/*
- * For cgroup writeback, multiple wb's may map to the same blkcg. Those
- * wb's can operate mostly independently but should share the congested
- * state. To facilitate such sharing, the congested state is tracked using
- * the following struct which is created on demand, indexed by blkcg ID on
- * its bdi, and refcounted.
- */
-struct bdi_writeback_congested {
- unsigned long state; /* WB_[a]sync_congested flags */
- refcount_t refcnt; /* nr of attached wb's and blkg */
-
-#ifdef CONFIG_CGROUP_WRITEBACK
- struct backing_dev_info *__bdi; /* the associated bdi, set to NULL
- * on bdi unregistration. For memcg-wb
- * internal use only! */
- int blkcg_id; /* ID of the associated blkcg */
- struct rb_node rb_node; /* on bdi->cgwb_congestion_tree */
-#endif
+struct wb_completion {
+ atomic_t cnt;
+ wait_queue_head_t *waitq;
};
+
+#define __WB_COMPLETION_INIT(_waitq) \
+ (struct wb_completion){ .cnt = ATOMIC_INIT(1), .waitq = (_waitq) }
+
+/*
+ * If one wants to wait for one or more wb_writeback_works, each work's
+ * ->done should be set to a wb_completion defined using the following
+ * macro. Once all work items are issued with wb_queue_work(), the caller
+ * can wait for the completion of all using wb_wait_for_completion(). Work
+ * items which are waited upon aren't freed automatically on completion.
+ */
+#define WB_COMPLETION_INIT(bdi) __WB_COMPLETION_INIT(&(bdi)->wb_waitq)
+
+#define DEFINE_WB_COMPLETION(cmpl, bdi) \
+ struct wb_completion cmpl = WB_COMPLETION_INIT(bdi)
/*
* Each wb (bdi_writeback) can perform writeback operations, is measured
@@ -120,7 +119,7 @@
struct percpu_counter stat[NR_WB_STAT_ITEMS];
- struct bdi_writeback_congested *congested;
+ unsigned long congested; /* WB_[a]sync_congested flags */
unsigned long bw_time_stamp; /* last time write bw is updated */
unsigned long dirtied_stamp;
@@ -162,16 +161,17 @@
struct rcu_head rcu;
};
#endif
+
+ ANDROID_KABI_RESERVE(1);
+ ANDROID_KABI_RESERVE(2);
};
struct backing_dev_info {
+ u64 id;
+ struct rb_node rb_node; /* keyed by ->id */
struct list_head bdi_list;
unsigned long ra_pages; /* max readahead in PAGE_SIZE units */
unsigned long io_pages; /* max allowed IO size */
- congested_fn *congested_fn; /* Function pointer if device is md/dm */
- void *congested_data; /* Pointer to aux data for congested func */
-
- const char *name;
struct kref refcnt; /* Reference counter for the structure */
unsigned int capabilities; /* Device capabilities */
@@ -188,23 +188,23 @@
struct list_head wb_list; /* list of all wbs */
#ifdef CONFIG_CGROUP_WRITEBACK
struct radix_tree_root cgwb_tree; /* radix tree of active cgroup wbs */
- struct rb_root cgwb_congested_tree; /* their congested states */
struct mutex cgwb_release_mutex; /* protect shutdown of wb structs */
struct rw_semaphore wb_switch_rwsem; /* no cgwb switch while syncing */
-#else
- struct bdi_writeback_congested *wb_congested;
#endif
wait_queue_head_t wb_waitq;
struct device *dev;
+ char dev_name[64];
struct device *owner;
struct timer_list laptop_mode_wb_timer;
#ifdef CONFIG_DEBUG_FS
struct dentry *debug_dir;
- struct dentry *debug_stats;
#endif
+
+ ANDROID_KABI_RESERVE(1);
+ ANDROID_KABI_RESERVE(2);
};
enum {
@@ -212,18 +212,8 @@
BLK_RW_SYNC = 1,
};
-void clear_wb_congested(struct bdi_writeback_congested *congested, int sync);
-void set_wb_congested(struct bdi_writeback_congested *congested, int sync);
-
-static inline void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
-{
- clear_wb_congested(bdi->wb.congested, sync);
-}
-
-static inline void set_bdi_congested(struct backing_dev_info *bdi, int sync)
-{
- set_wb_congested(bdi->wb.congested, sync);
-}
+void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
+void set_bdi_congested(struct backing_dev_info *bdi, int sync);
struct wb_lock_cookie {
bool locked;
--
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