i want to use the script in kernel script folder.

[윤영석]

hi, 
i want to use a script in kernel, but i can't use this.
in my terminal.
yoon at pc:~/project/aosp/kernel/linux/scripts$ ./checkpatch.pl sortextable.c 
Must be run from the top-level dir. of a kernel tree


Please let me know how to use this script.Thanks.
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