linux-kernel - Re: [PATCH] lib/vsprintf: Do not handle %pO[^F] as %px

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Message-ID: <20180807133855.d2yry6it5wnu6pqt@pathway.suse.cz>
Date:   Tue, 7 Aug 2018 15:38:55 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     Bart Van Assche <bart.vanassche@....com>
Cc:     linux-kernel@...r.kernel.org,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Joe Perches <joe@...ches.com>, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH] lib/vsprintf: Do not handle %pO[^F] as %px

On Mon 2018-08-06 15:34:21, Bart Van Assche wrote:
> This patch avoids that gcc reports the following when building with W=1:
> 
> lib/vsprintf.c:1941:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    switch (fmt[1]) {
>    ^~~~~~
> 
> Fixes: ce4fecf1fe15 ("vsprintf: Add %p extension "%pOF" for device tree")

To be precise, the above commit was fine because it was the last
"case" in "switch". It has got broken by the commit
7b1924a1d930eb2 ("vsprintf: add printk specifier %px").

Other than that the patch fixes a real problem. I have updated the "Fixes"
tag, added stable tag and pushed it into printk.git, for-4.19 branch.

Best Regards,
Petr