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SubjectRe: [PATCH 1/1] workqueue: use type int instead of bool to index array
On Thu, Sep 07, 2017 at 12:04:59AM +0800, zijun_hu wrote:
> On 2017/9/6 22:33, Tejun Heo wrote:
> > Hello,
> >
> > On Wed, Sep 06, 2017 at 11:34:14AM +0800, zijun_hu wrote:
> >> From: zijun_hu <zijun_hu@htc.com>
> >>
> >> type bool is used to index three arrays in alloc_and_link_pwqs()
> >> it doesn't look like conventional.
> >>
> >> it is fixed by using type int to index the relevant arrays.
> >
> > bool is a uint type which can be either 0 or 1. I don't see what the
> > benefit of this patch is.q
> >
> bool is NOT a uint type now, it is a new type introduced by gcc, it is
> rather different with "typedef int bool" historically

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n815.htm

Because C has existed for so long without a Boolean type, however, the
new standard must coexist with the old remedies. Therefore, the type
name is taken from the reserved identifier space. To maintain
orthogonal promotion rules, the Boolean type is defined as an unsigned
integer type capable of representing the values 0 and 1. The more
conventional names for the type and its values are then made available
only with the inclusion of the <stdbool.h> header. In addition, the
header defines a feature test macro to aid in integrating new code
with old code that defines its own Boolean type.

--
tejun

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