Re: [PATCH 1/4] drivers/net/ethernet/sfc: Add efx_ prefix toset_bit_le()

[Takuya Yoshikawa]

On Mon, 11 Jun 2012 14:09:15 +0000
Arnd Bergmann <arnd@xxxxxxxx> wrote:

> On Monday 11 June 2012, Takuya Yoshikawa wrote:
> > 
> >  /* Set bit in a little-endian bitfield */
> > -static inline void set_bit_le(unsigned nr, unsigned char *addr)
> > +static inline void efx_set_bit_le(unsigned nr, unsigned char *addr)
> >  {
> >         addr[nr / 8] |= (1 << (nr % 8));
> >  }
> >  
> >  /* Clear bit in a little-endian bitfield */
> > -static inline void clear_bit_le(unsigned nr, unsigned char *addr)
> > +static inline void efx_clear_bit_le(unsigned nr, unsigned char *addr)
> >  {
> >         addr[nr / 8] &= ~(1 << (nr % 8));
> >  }
> 
> Hmm, any reason why we're not just using the existing non-atomic
> __set_bit_le() here? I think the helpers in sfc and tulip can
> just get removed if you use those.

__set_bit_le() assumes long word alignment and does endian conversion
when needed.

To be honest, I am a bit scared of changing drivers which I cannot test
on real hardware.

	Takuya
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