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add a comment regarding FATMIRROR bit usage and restructure the code

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slighly to make the check more explicit
This commit is contained in:
jdolecek 2000-04-03 18:12:12 +00:00
parent 36e829de63
commit 2deec9c018
1 changed files with 6 additions and 4 deletions
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10
sys/msdosfs/msdosfs_vfsops.c
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@ -1,4 +1,4 @@
/* $NetBSD: msdosfs_vfsops.c,v 1.68 2000/03/30 02:27:35 simonb Exp $ */
/* $NetBSD: msdosfs_vfsops.c,v 1.69 2000/04/03 18:12:12 jdolecek Exp $ */
/*-
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
@ -503,10 +503,12 @@ msdosfs_mountfs(devvp, mp, p, argp)
pmp->pm_fatmult = 4;
pmp->pm_fatdiv = 1;
pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
if (getushort(b710->bpbExtFlags) & FATMIRROR)
pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
else
/* mirrorring is enabled if the FATMIRROR bit is not set */
if ((getushort(b710->bpbExtFlags) & FATMIRROR) == 0)
pmp->pm_flags |= MSDOSFS_FATMIRROR;
else
pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
} else
pmp->pm_flags |= MSDOSFS_FATMIRROR;