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Date: Tue, 27 Jan 2015 19:09:04 +0100
From: Richard Weinberger <richard@nod.at>
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To: Alexander Holler <holler@ahsoftware.de>,
        Arend van Spriel <arend@broadcom.com>
CC: Steven Rostedt <rostedt@goodmis.org>, Borislav Petkov <bp@alien8.de>,
        linux-mmc@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Chris Ball <chris@printf.net>, Ulf Hansson <ulf.hansson@linaro.org>
Subject: Re: [PATCH] mmc: print message if a card supports secure erase/trim
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Am 27.01.2015 um 19:04 schrieb Alexander Holler:
> Am 27.01.2015 um 18:53 schrieb Arend van Spriel:
> 
>> Ever used rgrep or grep -R. Anyway, if this is you use-case what about
>> the gazillion other pieces of info in the kernel. When moving in that
>> direction you can be sure dmesg will flush out.
> 
> Sorry, never heard about that -R and wasn't aware that the kernel does a lot of things. ;)
> 
> I don't want that ftrace stuff appears in dmesg, but I like to do
> 
> dmesg | grep -i mmc (or whatever is of interest)
> 
> instead of
> 
> grep -Rsi mmc /sys/<a hundred tabs to search a matching direcory> or something like
> 
> find /sys -iname '*mmc*' -exec <more silly complications> \;

You don't have to use grep or find.
Add a sysfs attribute, document it in Documentation/ABI and done.
By documenting stuff you'll make the world a better place.

Thanks,
//richard