Messages in this thread | | | Date | Sun, 22 Jul 2007 07:20:57 +0300 | From | Muli Ben-Yehuda <> | Subject | Re: [PATCH] x86: Create clflush() inline, remove hardcoded wbinvd |
| |
On Sat, Jul 21, 2007 at 03:09:41PM -0700, H. Peter Anvin wrote: > Muli Ben-Yehuda wrote: > > > > Ok, let's try again: > > > > You're changing this (pageattr.c) > > > > asm volatile("clflush (%0)" :: "r" (adr + i)); > > > > into this: > > > > asm volatile("clflush %0" : "+m" (*(char __force*)(adr + i))); > > > > The original one calls clflush with (adr + i), the new one with (*(adr > > + i)). Are these calls equivalent? > > Yes, they are. The parentheses which are part of the old assembly > string has the same effect as the asterisk operator in C.
Ah, I see. Thanks for the explanation!
Cheers, Muli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |