Messages in this thread | | | Subject | Re: MMIO and gcc re-ordering (Was: [PATCH] [POWERPC] Improve (in|out)_beXX() asm code) | From | Benjamin Herrenschmidt <> | Date | Fri, 23 May 2008 18:47:32 -0400 |
| |
On Fri, 2008-05-23 at 16:14 -0500, Scott Wood wrote:
> As Trent pointed out, if you change to eieio in the accessors, that'd > require drivers to also use mmiowb() before spin_unlock(), which fewer > drivers currently do.
No, this is a totally different issue. And we keep track of the need for a sync in spin_unlock already.
Ben.
| |