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Filename Latest commit message Latest commit date
Will Deacon 07fd256d53 arm64: vdso: Avoid ISB after reading from cntvct_el0 
commit 77ec462536a13d4b428a1eead725c4818a49f0b1 upstream.

We can avoid the expensive ISB instruction after reading the counter in
the vDSO gettime functions by creating a fake address hazard against a
dummy stack read, just like we do inside the kernel.

Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20210318170738.7756-5-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
2021-08-12 13:21:04 +02:00
arch arm64: vdso: Avoid ISB after reading from cntvct_el0 2021-08-12 13:21:04 +02:00
block blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit() 2021-08-12 13:20:58 +02:00
certs
crypto
Documentation userfaultfd: do not untag user pointers 2021-07-28 13:31:01 +02:00
drivers md/raid10: properly indicate failure when ending a failed write request 2021-08-12 13:21:03 +02:00
fs ext4: fix potential htree corruption when growing large_dir directories 2021-08-12 13:21:02 +02:00
include tee: add tee_shm_alloc_kernel_buf() 2021-08-12 13:21:01 +02:00
init
ipc
kernel timers: Move clearing of base::timer_running under base:: Lock 2021-08-12 13:21:03 +02:00
lib lib/decompress_unlz4.c: correctly handle zero-padding around initrds. 2021-07-20 16:10:46 +02:00
LICENSES
mm mm: slab: fix kmem_cache_create failed when sysfs node not destroyed 2021-07-25 14:35:14 +02:00
net Bluetooth: defer cleanup of resources in hci_unregister_dev() 2021-08-12 13:20:58 +02:00
samples
scripts scripts/tracing: fix the bug that can't parse raw_trace_func 2021-08-12 13:21:00 +02:00
security
sound ALSA: usb-audio: Add registration quirk for JBL Quantum 600 2021-08-12 13:20:59 +02:00
tools bpf, selftests: Adjust few selftest outcomes wrt unreachable code 2021-08-08 09:04:09 +02:00
usr
virt KVM: Do not leak memory for duplicate debugfs directories 2021-08-12 13:21:03 +02:00
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Makefile Linux 5.4.139 2021-08-08 09:04:09 +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.