[BUG] checkpatch: unescaped left brace in regex is deprecated

[Geyslan G. Bem]

Hello,

Follow checkpatch output using perl 5.22.0.

geyslan@hb ~/Projects/linux $ scripts/checkpatch.pl -f
drivers/usb/host/ehci-hub.c
Unescaped left brace in regex is deprecated, passed through in regex;
marked by <-- HERE in m/\((?^x:
            (?^x:
            (?:(?^:(?:(?^x:
            const|
            __percpu|
            __nocast|
            __safe|
            __bitwise__|
            __packed__|
            __packed2__|
            __naked|
            __maybe_unused|
            __always_unused|
            __noreturn|
            __used|
            __cold|
            __pure|
            __noclone|
            __deprecated|
            __read_mostly|
            __kprobes|
            (?^:(?^:(?^:__(?:mem|cpu|dev|net_|))(?:initdata\b))|(?^:(?^:__(?:mem|cpu|dev|net_|))(?:initconst\b))|(?^:(?^:__(?:mem|cpu|dev|net_|))(?:init\b)))|
            ____cacheline_aligned|
            ____cacheline_aligned_in_smp|
            ____cacheline_internodealigned_in_smp|
            __weak
...

geyslan@hb ~/Projects/linux $ perl --version

This is perl 5, version 22, subversion 0 (v5.22.0) built for
x86_64-linux-thread-multi

-- 
Regards,

Geyslan G. Bem
hackingbits.com
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