Re: [kvm-devel] [PATCH] KVM: Avoid using vmx instruction directly

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Avi Kivity wrote:
>> Or gcc
>> might move the assignment of phys_addr to after the inline assembly.
>>   
> "asm volatile" prevents that (and I'm not 100% sure it's necessary).

No, it won't necessarily.  "asm volatile" simply forces gcc to emit the
assembler, even if it thinks its output doesn't get used.  It makes no
ordering guarantees with respect to other code (or even other "asm
volatiles").   The "memory" clobbers should fix the ordering of the asms
though.


    J
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux