regarding const variables/structures

[inventsekar]

Hi, for the past three years I have been trying hard to do Linux kernel
development, but, with No success.

I don't know what is the exact reason...maybe, I didn't do much practical,
all the times I was only reading reading reading... so you can understand
my frustration, that I wanted to submit my first patch asap...and then
slowly I can do concentrate on other areas of kernel development... ok
thank you.

On Thu 13 Sep, 2018, 11:37 AM Nicholas Mc Guire, <der.herr at hofr.at> wrote:

> On Thu, Sep 13, 2018 at 09:12:32AM +0530, inventsekar wrote:
> > >>> A brute force grep in the kernel shows that there are 130493 " const
> "
> > in there
> > Hi Hofrat,
> > 1. may i know the command to do this above grep please..
>
> $ grep -cre " const " * | more
>
> will give you the " const " count per file - and then put a shell loop
> around it
>
> $ SUM=0 ; for N in `grep -cre " const " * | cut -f 2 -d ":" ` ; do let
> SUM=$SUM+$N ; done ; echo $SUM
>
> ...as noted "brute force"
>
> > 2. (and the opposite) may i know the command to grep other type of
> > variables/structures
>
> well if you want to know how to do that then you do need to look at basics
> if regular expressions are not clear then you might want to look at
> those first. And grep really is not the right tool to search for specific
> structures and their use use something like cscope.
>
> Try to focus on doing work you understand including the tools and processes
> around it - if you just are looking for a fast way of getting X patches
> into the kernel you are wasting your time. What the work from Bhumika Goyal
> shows is that its not about the complexity of the change but about the
> systematic approach based on using understanding a problem class,
> translating
> it to an abstract representation amenable to tools (coccinelle in this
> case)
> and documenting her understanding in the commit messages to each patch.
>
> thx!
> hofrat
>
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