add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/affs/file.c
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@@ -14,6 +14,7 @@
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  */
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 #include <linux/uio.h>
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+#include <linux/blkdev.h>
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 #include "affs.h"
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 static struct buffer_head *affs_get_extblock_slow(struct inode *inode, u32 ext);
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@@ -878,7 +879,7 @@
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 	if (inode->i_size > AFFS_I(inode)->mmu_private) {
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 		struct address_space *mapping = inode->i_mapping;
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 		struct page *page;
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-		void *fsdata;
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+		void *fsdata = NULL;
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 		loff_t isize = inode->i_size;
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 		int res;
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