add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nilfs2/segbuf.c
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@@ -101,6 +101,12 @@
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 	if (unlikely(!bh))
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 		return -ENOMEM;
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+	lock_buffer(bh);
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+	if (!buffer_uptodate(bh)) {
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+		memset(bh->b_data, 0, bh->b_size);
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+		set_buffer_uptodate(bh);
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+	}
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+	unlock_buffer(bh);
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 	nilfs_segbuf_add_segsum_buffer(segbuf, bh);
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 	return 0;
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 }
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@@ -505,7 +511,7 @@
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 	} while (--segbuf->sb_nbio > 0);
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 	if (unlikely(atomic_read(&segbuf->sb_err) > 0)) {
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-		nilfs_msg(segbuf->sb_super, KERN_ERR,
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+		nilfs_err(segbuf->sb_super,
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 			  "I/O error writing log (start-blocknr=%llu, block-count=%lu) in segment %llu",
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 			  (unsigned long long)segbuf->sb_pseg_start,
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 			  segbuf->sb_sum.nblocks,