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Filename Latest commit message Latest commit date
Halil Pasic 1dc6df795c s390/pv: fix the forcing of the swiotlb 
commit 93ebb6828723b8aef114415c4dc3518342f7dcad upstream.

Since commit 903cd0f315fe ("swiotlb: Use is_swiotlb_force_bounce for
swiotlb data bouncing") if code sets swiotlb_force it needs to do so
before the swiotlb is initialised. Otherwise
io_tlb_default_mem->force_bounce will not get set to true, and devices
that use (the default) swiotlb will not bounce despite switolb_force
having the value of SWIOTLB_FORCE.

Let us restore swiotlb functionality for PV by fulfilling this new
requirement.

This change addresses what turned out to be a fragility in
commit 64e1f0c531 ("s390/mm: force swiotlb for protected
virtualization"), which ain't exactly broken in its original context,
but could give us some more headache if people backport the broken
change and forget this fix.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Fixes: 903cd0f315fe ("swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing")
Fixes: 64e1f0c531 ("s390/mm: force swiotlb for protected virtualization")
Cc: stable@vger.kernel.org #5.3+
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-22 12:26:37 +02:00
arch s390/pv: fix the forcing of the swiotlb 2021-09-22 12:26:37 +02:00
block scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND 2021-09-22 12:26:23 +02:00
certs
crypto
Documentation docs: Fix infiniband uverbs minor number 2021-09-22 12:26:23 +02:00
drivers cpufreq: powernv: Fix init_chip_info initialization in numa=off 2021-09-22 12:26:37 +02:00
fs ovl: fix BUG_ON() in may_delete() when called from ovl_cleanup() 2021-09-22 12:26:37 +02:00
include serial: 8250: Define RX trigger levels for OxSemi 950 devices 2021-09-22 12:26:29 +02:00
init
ipc
kernel workqueue: Fix possible memory leaks in wq_numa_init() 2021-09-22 12:26:30 +02:00
lib bpf/tests: Do not PASS tests without actually testing the result 2021-09-22 12:26:29 +02:00
LICENSES
mm
net fix array-index-out-of-bounds in taprio_change 2021-09-22 12:26:36 +02:00
samples samples: bpf: Fix tracex7 error raised on the missing argument 2021-09-22 12:26:30 +02:00
scripts kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y 2021-09-22 12:26:26 +02:00
security Smack: Fix wrong semantics in smk_access_entry() 2021-09-22 12:26:27 +02:00
sound ASoC: rockchip: i2s: Fixup config for DAIFMT_DSP_A/B 2021-09-22 12:26:35 +02:00
tools selftests/bpf: Enlarge select() timeout for test_maps 2021-09-22 12:26:34 +02:00
usr
virt
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Makefile Linux 5.4.147 2021-09-16 12:56:14 +02:00
README

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.