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/dm-bufio.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/kernel/include/linux/dm-bufio.h b/kernel/include/linux/dm-bufio.h
index 45ba37a..90bd558 100644
--- a/kernel/include/linux/dm-bufio.h
+++ b/kernel/include/linux/dm-bufio.h
@@ -119,6 +119,11 @@
 int dm_bufio_issue_flush(struct dm_bufio_client *c);
 
 /*
+ * Send a discard request to the underlying device.
+ */
+int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t count);
+
+/*
  * Like dm_bufio_release but also move the buffer to the new
  * block. dm_bufio_write_dirty_buffers is needed to commit the new block.
  */
@@ -132,6 +137,13 @@
 void dm_bufio_forget(struct dm_bufio_client *c, sector_t block);
 
 /*
+ * Free the given range of buffers.
+ * This is just a hint, if the buffer is in use or dirty, this function
+ * does nothing.
+ */
+void dm_bufio_forget_buffers(struct dm_bufio_client *c, sector_t block, sector_t n_blocks);
+
+/*
  * Set the minimum number of buffers before cleanup happens.
  */
 void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n);

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