Re: [PATCH 3/3] blk-throttle: don't parse cgroup path if trace isn't enabled

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

 



Steven Rostedt <rostedt@xxxxxxxxxxx> writes:

>> Do we want to return !!(bt->act_mask & BLK_TC_NOTIFY)?
>
> The return type is bool. I would think that gcc would be smart enough
> to make the conversion.
>
> To check, I compiled the following function:
>
> bool testbool(int x)
> {
>         return x & 1<<3;
> }
>
> and the result was:
>
>
> 0000000000000000 <testbool>:
>    0:   55                      push   %rbp
>    1:   48 89 e5                mov    %rsp,%rbp
>    4:   89 7d fc                mov    %edi,-0x4(%rbp)
>    7:   8b 45 fc                mov    -0x4(%rbp),%eax
>    a:   83 e0 08                and    $0x8,%eax
>    d:   85 c0                   test   %eax,%eax
>    f:   0f 95 c0                setne  %al
>   12:   5d                      pop    %rbp
>   13:   c3                      retq   
>
> I get the same by adding !!(x & 1<<3)
>
> Looks like it does the conversion.

Cool, thanks!

-Jeff
--
To unsubscribe from this list: send the line "unsubscribe linux-block" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux