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Filename Latest commit message Latest commit date
Marc Zyngier 2a9278ac9c irqchip/gic: Atomically update affinity
commit 005c34ae4b44f085120d7f371121ec7ded677761 upstream.

The GIC driver uses a RMW sequence to update the affinity, and
relies on the gic_lock_irqsave/gic_unlock_irqrestore sequences
to update it atomically.

But these sequences only expand into anything meaningful if
the BL_SWITCHER option is selected, which almost never happens.

It also turns out that using a RMW and locks is just as silly,
as the GIC distributor supports byte accesses for the GICD_TARGETRn
registers, which when used make the update atomic by definition.

Drop the terminally broken code and replace it by a byte write.

Fixes: 04c8b0f82c ("irqchip/gic: Make locking a BL_SWITCHER only feature")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-09 09:37:56 +02:00
arch MIPS: Add missing EHB in mtc0 -> mfc0 sequence for DSPen 2020-07-09 09:37:56 +02:00
block block: update hctx map when use multiple maps 2020-06-30 15:37:06 -04:00
certs
crypto crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock() 2020-07-09 09:37:52 +02:00
Documentation
drivers irqchip/gic: Atomically update affinity 2020-07-09 09:37:56 +02:00
fs cifs: Fix the target file was deleted when rename failed. 2020-07-09 09:37:55 +02:00
include crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock() 2020-07-09 09:37:52 +02:00
init
ipc
kernel kgdb: Avoid suspicious RCU usage warning 2020-07-09 09:37:51 +02:00
lib test_objagg: Fix potential memory leak in error handling 2020-06-30 15:37:04 -04:00
LICENSES
mm mm/slub: fix stack overruns with SLUB_STATS 2020-07-09 09:37:50 +02:00
net rxrpc: Fix afs large storage transmission performance drop 2020-07-09 09:37:52 +02:00
samples samples/vfs: avoid warning in statx override 2020-07-09 09:37:54 +02:00
scripts recordmcount: support >64k sections 2020-06-30 15:37:05 -04:00
security
sound Revert "ALSA: usb-audio: Improve frames size computation" 2020-07-09 09:37:55 +02:00
tools selftests: tpm: Use /bin/sh instead of /bin/bash 2020-07-09 09:37:51 +02:00
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Makefile Linux 5.4.50 2020-06-30 16:21:55 -04:00
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.