Re: [Use cpuops V1 06/11] drivers: Replace __get_cpu_var with __this_cpu_readif not used for an address.

[Tejun Heo]

On 12/06/2010 06:16 PM, Christoph Lameter wrote:
> __get_cpu_var() can be replaced with this_cpu_read and will then use a single
> read instruction with implied address calculation to access the correct per cpu
> instance.
> 
> However, the address of a per cpu variable passed to __this_cpu_read() cannot be
> determed (since its an implied address conversion through segment prefixes).
> Therefore apply this only to uses of __get_cpu_var where the addres of the
> variable is not used.
> 
> V3->V4:
> 	- Move one instance of this_cpu_inc_return to a later patch
> 	  so that this one can go in without percpu infrastructrure
> 	  changes.
> 
> Cc: Neil Horman <nhorman@xxxxxxxxxxxxx>
> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
> Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>

applied.

-- 
tejun
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