Re: [PATCH] staging: speakup: kobjects.c: fix char argument to %02x

[Joe Perches]

On Sun, 2015-12-06 at 01:05 +0100, Rasmus Villemoes wrote:
> If char is signed and ch happens to be negative, printing ch with
> "%02x" will not do as intended (when ch is -19, one will get
> "ffffffed"). Fix that by masking with 0xff.

I presume there are a lot of these in the kernel.
Did you use a tool to find this or just inspection?

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