lkml.org 
[lkml]   [2017]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 2/2] mdadm.c: fix compile error "switch condition has boolean value"
Date
On 03/30/2017 03:52 AM, Gioh Kim wrote:
> On Thu, Mar 30, 2017 at 08:38:35AM +1100, NeilBrown wrote:
>> On Thu, Mar 30 2017, jes.sorensen@gmail.com wrote:
>>
>>> Gioh Kim <gi-oh.kim@profitbricks.com> writes:
>>>> Remove a boolean expression in switch condition
>>>> to prevent compile error of some compilers.
>>>
>>> Please be specific, which compile is unable to handle this?
>>>
>>>> Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com>
>>>> ---
>>>> mdadm.c | 6 +++---
>>>> 1 file changed, 3 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/mdadm.c b/mdadm.c
>>>> index 08ddcab..a98a051 100644
>>>> --- a/mdadm.c
>>>> +++ b/mdadm.c
>>>> @@ -1905,11 +1905,11 @@ static int misc_list(struct mddev_dev *devlist,
>>>> rv |= SetAction(dv->devname, c->action);
>>>> continue;
>>>> }
>>>> - switch(dv->devname[0] == '/') {
>>>> - case 0:
>>>> + switch(dv->devname[0]) {
>>>> + default:
>>>> mdfd = open_dev(dv->devname);
>>>> if (mdfd >= 0) break;
>>>> - case 1:
>>>> + case '/':
>>>> mdfd = open_mddev(dv->devname, 1);
>>>> }
>>>> if (mdfd>=0) {
>>>
>>> While I agree the original code is ugly, I am not convinced your
>>> replacement is a lot prettier.
>>>
>>
>> Maybe
>>
>> if (dv->devname[0] == '/' ||
>> (mdfd = open_dev(dv->devname)) < 0)
>> mdfd = open_mddev(dv->devname, 1);
>>
>> ??
>> NeilBrown
>
> Yes, the initial version I thought was:
>
> if (dev->devname[0] != '/')
> mdfd = open_dev(dv->devname);
> if (dev->devname[0] == '/' || mdfd < 0)
> mdfd = open_mddev(dv->devname, 1);
>
> But I thought you have a reason to use switch-case expression,
> so I kept switch-case.
> If you agree, I'll send v2 patch using if-expression.
>

I like this solution better, I much favor code that is more explicit in
what it does. Request less brain capacity for me to read :)

Cheers,
Jes

\
 
 \ /
  Last update: 2017-03-30 17:54    [W:0.054 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site