On Tue, Jan 13, 2015 at 03:09:03PM +0100, Arnd Bergmann wrote:
> A recent change introduced a type cast from a private 64-bit
> value to a pointer, which works fine on 64-bit architectures,
> but not on 32-bit ones, where it produces a harmless compiler
> warning:
>
> fs/btrfs/extent_io.c: In function 'btrfs_free_io_failure_record':
> fs/btrfs/extent_io.c:2193:13: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
>
> This adds an intermediate cast to 'unsigned long', which tells
> the compiler to ignore the type mismatch.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Fixes: f612496bca664 ("Btrfs: cleanup the read failure record after write
> or when the inode is freeing")
Already reported, but not merged
https://patchwork.kernel.org/patch/5541281/
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