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[ Upstream commit a77749b3e21813566cea050bbb3414ae74562eba ] When attempting to build a too long path we are currently returning -ENOMEM, which is very odd and misleading. So update fs_path_ensure_buf() to return -ENAMETOOLONG instead. Also, while at it, move the WARN_ON() into the if statement's expression, as it makes it clear what is being tested and also has the effect of adding 'unlikely' to the statement, which allows the compiler to generate better code as this condition is never expected to happen. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> 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.