From: Dave Airlie <[EMAIL PROTECTED]> Date: Sat, 26 May 2007 21:32:10 +0100 (IST)
> the DRM can use cmpxchg in userspace, to implement DRM_CAS, have a look in > drm git libdrm/xf86drm.h we appear to have a sparc implementation, this > gives us fast userspace locking, however if an arch doesn't implement > DRM_CAS we fallback to the heavyweight in-kernel lock, That instruction only works on sparc64 cpus, which includes 32-bit apps running a system with sparc64 cpus. That's why I hard-code the opcode in that asm statement of the DRM sources. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
