add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/affs/inode.c
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@@ -93,7 +93,7 @@
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 	case ST_ROOT:
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 		inode->i_uid = sbi->s_uid;
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 		inode->i_gid = sbi->s_gid;
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-		/* fall through */
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+		fallthrough;
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 	case ST_USERDIR:
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 		if (be32_to_cpu(tail->stype) == ST_USERDIR ||
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 		    affs_test_opt(sbi->s_flags, SF_SETMODE)) {
..
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@@ -150,10 +150,10 @@
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 	}
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 	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
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-		       = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
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+		       = (be32_to_cpu(tail->change.days) * 86400LL +
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 		         be32_to_cpu(tail->change.mins) * 60 +
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 			 be32_to_cpu(tail->change.ticks) / 50 +
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-			 ((8 * 365 + 2) * 24 * 60 * 60)) +
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+			 AFFS_EPOCH_DELTA) +
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 			 sys_tz.tz_minuteswest * 60;
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 	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
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 	affs_brelse(bh);