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f1ae05b8ea
We're computing a few values several times:
1) The current ordered extent's end offset inside the while loop, we have
computed it and stored it in the 'entry_end' variable but then we
compute it again later as the first argument to the min() macro;
2) The end file offset, open coded 3 times;
3) The current length (stored in variable 'len') computed 2 times, one
inside an assertion and the other when assigning to the 'len' variable.
So use existing variables and add new ones to prevent repeating these
expressions and reduce the source code.
We were also subtracting one from the result of min() macro call and
then adding 1 back in the next line, making both operations pointless.
So just remove the decrement and increment by 1.
This also reduces very slightly the object code.
Before:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1916576 161679 15592 2093847 1ff317 fs/btrfs/btrfs.ko
After:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1916556 161679 15592 2093827 1ff303 fs/btrfs/btrfs.ko
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Anand Jain <asj@kernel.org>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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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.