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9d9076238f
Refactor the condition for breaking the loop within xattr_find_entry(). Elimate the usage of "<=" and take condition shortcut when "!cmp" is true. Originally, the condition was "(cmp <= 0 && (sorted || cmp == 0))", which means after it knows "cmp <= 0" is true, it has to check the value of "sorted" and "cmp". The checking of "cmp" here would be redundant since it has already checked it. Observing from the logic, when "cmp == 0" the branch is going to be true, no need to check "cmp == 0" again, so we only need to take shortcut when "cmp == 0", on the other hand, we'll check "sorted" when "cmp < 0". The refactor can shrink the generated code size by 44 bytes. Numerous instructions can be saved thus should also benefit execution efficiency as well. $ ./scripts/bloat-o-meter vmlinux_old vmlinux_new add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-44 (-44) Function old new delta xattr_find_entry 300 256 -44 Total: Before=22989434, After=22989390, chg -0.00% The test is done on kernel version 6.16 with x86_64 defconfig and gcc 13.3.0. Signed-off-by: I Hsin Cheng <richard120310@gmail.com> Link: https://patch.msgid.link/20250708020013.175728-1-richard120310@gmail.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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.