d0e71e23ec
This reverts commit e6595224464b692ddae193d783402130d1625147. These kinds of patches are only making the code worse. Compilers don't care about the unnecessary check, but removing it makes the code less obvious to a human. The declaration of 'len' is more than 80 lines earlier, so a human won't easily see that 'len' is of an unsigned type, so to a human the range check that checks against zero is much more explicit and obvious. Any tool that complains about a range check like this just because the variable is unsigned is actively detrimental, and should be ignored. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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 reStructuredText 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.