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[ Upstream commit333d073dee] 'size' is unsigned, it never less than zero. Link: https://lkml.kernel.org/r/20221105110611.28920-1-yuehaibing@huawei.com Fixes:6c26df84e1("selftests: cgroup: return -errno from cg_read()/cg_write() on failure") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Yosry Ahmed <yosryahmed@google.com> Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Reviewed-by: Kamalesh Babulal <kamalesh.babulal@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: zefan li <lizefan.x@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.