ganiszulfa

1. what is !! (double exclamation mark) in C language?

It is just a unary NOT then a unary NOT again.

The effect of this is that it will transform the output of that incredibly long-named function 
into either 1 or 0. If the return value of the function is greater (or less) than 0, double NOT 
will produce 1. If it is 0 then double NOTing it will produce 0.

2. Why do a lot of #defines in the kernel use do { ... } while(0)?

ganiszulfa

our WORKING code is in ~/code/milestone141117/linux-kvm-arm/exynos5250-arndale.dts

$ ./scripts/dtc/dtc -O dtb -o [nama dtb].dtb \
       [lokasi dts].dts

ganiszulfa

Having trouble installing the latest stable version of tmux?

I know, official package for your OS/distro is outdated and you just want the newest version of tmux.

Well, this script should save you some time with that.

Prerequisities

• gcc

ganiszulfa

# you have ctags but it does not work...
$ ctags -R --exclude=.git --exclude=log *
ctags: illegal option -- R
usage: ctags [-BFadtuwvx] [-f tagsfile] file ...

#you need to get new ctags, i recommend homebrew but anything will work
$ brew install ctags

#alias ctags if you used homebrew
$ alias ctags="`brew --prefix`/bin/ctags"

ganiszulfa

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

ganiszulfa

On Mac OS (host):

Shutdown your VM and do:

VirtualBox > Settings > Network > Add (you will get vboxnet0)

On a terminal ifconfig will show you new interface vboxnet0

VM's Settings > System > check "Enable I/O APIC." VM's Settings > Network > Adapter 2 > host-only vboxnet0