Messages in this thread | | | Date | Sat, 01 Mar 2008 10:38:39 +0100 | From | Frank Seidel <> | Subject | Re: [RFC][PATCH] fs/partitions/msdos: directly check if FAT boot sector |
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Andrew Morton schrieb: > fs/partitions/msdos.c: In function 'msdos_partition': > fs/partitions/msdos.c:446: warning: comparison is always true due to limited range of data type > > didn't you get this?
Yes, sorry, but i saw it too late after posting.
> The reason is that FAT_VALID_MEDIA() is bogus:
yes, i stated this in our bug to the complaint (https://bugzilla.novell.com/show_bug.cgi?id=364365#c15), but should have also posted it here, sorry.
> #define FAT_VALID_MEDIA(x) ((0xF8 <= (x) && (x) <= 0xFF) || (x) == 0xF0) > > It appears that the on-disk field which FAT_VALID_MEDIA() is designed to > test is only 8-bit, so the comparison with 0xff is pointless. The only > existing caller of FAT_VALID_MEDIA() cheats by copying the value into a > local unsigned int first. > > So I'll leave things as they are for now, but I'd ask that someone can > confirm that we should simply remove the 0xff test from FAT_VALID_MEDIA()?
At least in my opinion it should be removed.
Thanks, Frank
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