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There's no need to compare the current extent state's end offset to (u64)-1 to check if we have the last possible record and to check as as well if after updating the start offset to the end offset of the current record plus one we are still inside the target range. Instead we can simplify and exit if the current extent state ends at or after the target range and then remove the check for the (u64)-1 as well as the check to see if the updated start offset (to last_end + 1) is still inside the target range. Besides the simplification, this also avoids seaching for the next extent state record (through next_state()) when the current extent state record ends at the same offset as our target range, which is pointless and only wastes times iterating through the rb tree. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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.