[U-Boot] tools/fw_env: use fsync to ensure that data is physically stored

Tue Jul 25 00:42:03 UTC 2017

On Mon, May 20, 2013 at 09:34:42PM +0200, Michael Heimpold wrote:

> Closing a file descriptor does not guarantee that the data has been
> successfully saved to disk, as the kernel might defer the write.
> 
> Signed-off-by: Michael Heimpold <mhei at heimpold.de>

Applied to u-boot/master, thanks!

-- 
Tom
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