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Eric Dumazet 580f98cc33 tcp: tcp_check_req() can be called from process context 
This is a follow up of commit 0a375c8224 ("tcp: tcp_rtx_synack()
can be called from process context").

Frederick Lawler reported another "__this_cpu_add() in preemptible"
warning caused by the same reason.

In my former patch I took care of tcp_rtx_synack()
but forgot that tcp_check_req() also contained some SNMP updates.

Note that some parts of tcp_check_req() always run in BH context,
I added a comment to clarify this.

Fixes: 8336886f78 ("tcp: TCP Fast Open Server - support TFO listeners")
Link: https://lore.kernel.org/netdev/8cd33923-a21d-397c-e46b-2a068c287b03@cloudflare.com/T/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Frederick Lawler <fred@cloudflare.com>
Tested-by: Frederick Lawler <fred@cloudflare.com>
Link: https://lore.kernel.org/r/20230227083336.4153089-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-02-27 11:59:29 -08:00
arch Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
block Updates for the interrupt subsystem: 2023-02-21 10:03:48 -08:00
certs certs: don't try to update blacklist keys 2023-02-13 10:11:20 +02:00
crypto Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
Documentation docs: net: fix inaccuracies in msg_zerocopy.rst 2023-02-24 18:31:31 -08:00
drivers net: phy: c45: fix network interface initialization failures on xtensa, arm:cubieboard 2023-02-27 11:41:49 -08:00
fs Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
include net: dsa: seville: ignore mscc-miim read errors from Lynx PCS 2023-02-26 18:31:37 +00:00
init Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
io_uring for-6.3/block-2023-02-16 2023-02-20 14:27:21 -08:00
ipc fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
kernel Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
lib Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
net tcp: tcp_check_req() can be called from process context 2023-02-27 11:59:29 -08:00
rust Rust changes for v6.3 2023-02-20 10:40:42 -08:00
samples samples/bpf: Use bpf_{btf,link,map,prog}_get_info_by_fd() 2023-02-16 15:32:45 -08:00
scripts Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
security This update includes the following changes: 2023-02-21 18:10:50 -08:00
sound ARM: unused boardfile removal for 6.3 2023-02-20 15:28:57 -08:00
tools tools: net: add __pycache__ to gitignore 2023-02-24 11:55:47 -08:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt VFIO fixes for v6.2-rc6 2023-01-23 11:56:07 -08:00
.clang-format iommufd for 6.2 2022-12-14 09:15:43 -08:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore *.rpm 2022-12-30 17:22:14 +09:00
.mailmap 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SCTP maintainers 2023-02-02 11:35:33 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
Makefile Rust changes for v6.3 2023-02-20 10:40:42 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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.