[PATCH 08/10] commands: sync: add new command to flush cached writes

[Sascha Hauer]

On Tue, Jul 30, 2024 at 09:19:27AM +0200, Ahmad Fatoum wrote:
> In barebox, the dirty block cache for a given device is flushed when
> closing all file descriptors to it, a cached block needs to be evicted
> due to pressure or when barebox shuts down.
> 
> There are valid uses to do it explicitly however:
> 
>   - When benchmarking write speed to a block device
>   - Before forced resets, because a regular reset would run shutdown
>     code that should be omitted.
> 
> Add a sync command that does this. Unlike the userspace variant, we
> don't both to implement a argument-less sync that's global. Users are

s/both/bother/

Sascha

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