修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

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