kern/53224: src/sys/arch/aarch64/include/db_machdep.h: many bitmask errors ?

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>Number:         53224
>Category:       kern
>Synopsis:       src/sys/arch/aarch64/include/db_machdep.h: many bitmask errors ?
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 28 14:40:00 +0000 2018
>Originator:     David Binderman
>Release:        cvs-20180428
>Organization:
>Environment:
>Description:
> [src/sys/arch/aarch64/include/db_machdep.h:179]: (style) Expression '(X & 0x7e400000) == 0x29800000' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:155]: (style) Expression '(X & 0x7e400000) == 0x29c00000' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:152]: (style) Expression '(X & 0xbf7ffc00) == 0x48dffc00' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:151]: (style) Expression '(X & 0xbf7ffc00) == 0x88dffc00' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:150]: (style) Expression '(X & 0xbf800000) == 0x79800000' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:149]: (style) Expression '(X & 0xbf800c00) == 0x78a00800' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:147]: (style) Expression '(X & 0xbfa00400) == 0x78800c00' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:145]: (style) Expression '(X & 0xbfa00c00) == 0x78800000' is always false.
> [src/sys/arch/aarch64/include/db_machdep.h:177]: (style) Expression '(X & 0xbfc00000) == 0x79000000' is always false.

Many more examples from lines 123 to 179.
>How-To-Repeat:

>Fix: