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7d286849a8
This is one of those hot functions in path walking, and it's doing things in just the wrong order that causes slightly unnecessary extra work. Move the name pointer update and the setting of 'nd->last' up a bit, so that the (unlikely) filesystem-specific hashing can run on them in place, instead of having to set up a copy on the stack and copy things back and forth. Because even when the hashing is not run, it causes the stack frame of the function to be bigger to hold the unnecessary temporary copy. This also means that we never then reference the full "hashlen" field after calculating it, and can clarify the code with just using the length part. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
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| .clang-format | ||
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| .get_maintainer.ignore | ||
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| README | ||
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.