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Håkon Bugge e623a48ee4 rds: Make sure updates to cp_send_gen can be observed
cp->cp_send_gen is treated as a normal variable, although it may be
used by different threads.

This is fixed by using {READ,WRITE}_ONCE when it is incremented and
READ_ONCE when it is read outside the {acquire,release}_in_xmit
protection.

Normative reference from the Linux-Kernel Memory Model:

    Loads from and stores to shared (but non-atomic) variables should
    be protected with the READ_ONCE(), WRITE_ONCE(), and
    ACCESS_ONCE().

Clause 5.1.2.4/25 in the C standard is also relevant.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Knut Omang <knut.omang@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-20 15:33:01 -07:00
arch
block
certs
crypto
Documentation
drivers net: ethernet: ti: cpsw: Push the request_irq function to the end of probe 2017-07-20 15:28:54 -07:00
firmware
fs
include bpf: fix mixed signed/unsigned derived min/max value bounds 2017-07-20 15:20:27 -07:00
init
ipc
kernel bpf: fix mixed signed/unsigned derived min/max value bounds 2017-07-20 15:20:27 -07:00
lib
mm
net rds: Make sure updates to cp_send_gen can be observed 2017-07-20 15:33:01 -07:00
samples
scripts
security
sound
tools bpf: more tests for mixed signed and unsigned bounds checks 2017-07-20 15:20:27 -07:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.