Re: [PATCH 6/6] vfs: introduce FMODE_NEG_OFFSET for allowing negative f_pos

From: OGAWA Hirofumi
Date: Sun Jan 17 2010 - 20:59:22 EST

KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> writes:

>> BTW, another concern by negative "pos" value is, the following like code
>> pos >> shift_bits
>> it will break the above. So, I think it should be checked if not yet.
> Where do we check ?
> FMODE_NEG_OFFSET is just used by /dev/mem and /proc/<pid>/mem. And I don't
> think there are no additonal users. So, I myself don't have has such concerns...

Sorry, it's just my concern. I'm not checking real path (e.g. vfs) of
related to /dev/mem, if there is no user of such code, it's ok.

OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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