linux-kernel - Re: [PATCH] btrfs: tree-checker: use %zu format string for size

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Date:   Fri, 13 Oct 2017 14:06:18 +0200
From:   David Sterba <dsterba@...e.cz>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>,
        Qu Wenruo <quwenruo.btrfs@....com>,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: tree-checker: use %zu format string for size_t

On Fri, Oct 13, 2017 at 11:27:35AM +0200, Arnd Bergmann wrote:
> We now get a harmless compile-time on 32-bit architectures:
> 
> fs/btrfs/tree-checker.c: In function 'check_extent_data_item':
> fs/btrfs/tree-checker.c:189:70: error: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'unsigned int' [-Werror=format=]
> 
> This changes the format string to use %zu instead of %lu for size_t.
> 
> Fixes: c1f6520bf360 ("btrfs: tree-checker: Enhance output for check_extent_data_item")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: David Sterba <dsterba@...e.com>