Linus Torvalds d2c95f9d68 x86: don't use REP_GOOD or ERMS for user memory clearing
The modern target to use is FSRS (Fast Short REP STOS), and the other
cases should only be used for bigger areas (ie mainly things like page
clearing).

Note! This changes the conditional for the inlining from FSRM ("fast
short rep movs") to FSRS ("fast short rep stos").

We'll have a separate fixup for AMD microarchitectures that have a good
'rep stosb' yet do not set the new Intel-specific FSRS bit (because FSRM
was there first).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-04-18 17:05:28 -07:00
2023-02-26 11:53:25 -08:00
2023-04-16 09:46:32 -07:00
2023-04-15 10:29:53 -07:00
2023-03-03 14:51:15 -08:00
2023-03-01 09:27:00 -08:00
2022-09-28 09:02:20 +02:00
2022-10-10 12:00:45 -07:00
2023-04-11 09:51:45 -07:00
2023-04-16 15:23:53 -07:00

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 Restructured Text 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.
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