On Mon, 30 Jul 2012, Paul E. McKenney wrote:

> On Sun, Jul 29, 2012 at 01:13:34AM -0400, Mikulas Patocka wrote:
> > On Sat, 28 Jul 2012, Eric Dumazet wrote:
> > > On Sat, 2012-07-28 at 12:41 -0400, Mikulas Patocka wrote:
> 
> [ . . . ]
> 
> > > (bdev->bd_block_size should be read exactly once )
> > 
> > Rewrite all direct and non-direct io code so that it reads block size just 
> > once ...
> 
> For whatever it is worth, the 3.5 Linux kernel only has about ten mentions
> of bd_block_size, at least according to cscope.
> 
>                                                       Thanx, Paul

plus 213 uses of i_blkbits (which is derived directly from bd_block_size). 
45 of them is in fs/*.c and mm/*.c

Mikulas
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