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fc8418eca4
struct uniqframe has one hole. Reorder the fields to save 8 bytes.
Statistics before:
$ pahole --class_name=uniqframe net/can/raw.o
struct uniqframe {
int skbcnt; /* 0 4 */
/* XXX 4 bytes hole, try to pack */
const struct sk_buff * skb; /* 8 8 */
unsigned int join_rx_count; /* 16 4 */
/* size: 24, cachelines: 1, members: 3 */
/* sum members: 16, holes: 1, sum holes: 4 */
/* padding: 4 */
/* last cacheline: 24 bytes */
};
...and after:
$ pahole --class_name=uniqframe net/can/raw.o
struct uniqframe {
const struct sk_buff * skb; /* 0 8 */
int skbcnt; /* 8 4 */
unsigned int join_rx_count; /* 12 4 */
/* size: 16, cachelines: 1, members: 3 */
/* last cacheline: 16 bytes */
};
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Link: https://patch.msgid.link/20250917-can-raw-repack-v2-1-395e8b3a4437@kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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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.