linux

Go to file

Mikulas Patocka ce690fa1d5 xfs: don't update mtime on COW faults commit `b17164e258` upstream. When running in a dax mode, if the user maps a page with MAP_PRIVATE and PROT_WRITE, the xfs filesystem would incorrectly update ctime and mtime when the user hits a COW fault. This breaks building of the Linux kernel. How to reproduce: 1. extract the Linux kernel tree on dax-mounted xfs filesystem 2. run make clean 3. run make -j12 4. run make -j12 at step 4, make would incorrectly rebuild the whole kernel (although it was already built in step 3). The reason for the breakage is that almost all object files depend on objtool. When we run objtool, it takes COW page fault on its .data section, and these faults will incorrectly update the timestamp of the objtool binary. The updated timestamp causes make to rebuild the whole tree. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-09 19:12:30 +02:00
arch	tracing/kprobes, x86/ptrace: Fix regs argument order for i386	2020-09-09 19:12:30 +02:00
block	blk-mq: order adding requests to hctx->dispatch and checking SCHED_RESTART	2020-09-03 11:27:01 +02:00
certs
crypto	crypto: af_alg - Work around empty control messages without MSG_MORE	2020-09-03 11:27:05 +02:00
Documentation	dt-bindings: mmc: tegra: Add tmclk for Tegra210 and later	2020-09-05 11:22:50 +02:00
drivers	iommu/vt-d: Handle 36bit addressing for x86-32	2020-09-09 19:12:30 +02:00
fs	xfs: don't update mtime on COW faults	2020-09-09 19:12:30 +02:00
include	include/linux/log2.h: add missing () around n in roundup_pow_of_two()	2020-09-09 19:12:29 +02:00
init
ipc
kernel	kbuild: add variables for compression tools	2020-09-03 11:27:10 +02:00
lib
LICENSES
mm
net	net/packet: fix overflow in tpacket_rcv	2020-09-09 19:12:29 +02:00
samples
scripts	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2020-09-03 11:27:10 +02:00
security
sound	ALSA: usb-audio: Update documentation comment for MS2109 quirk	2020-09-03 11:27:11 +02:00
tools	perf jevents: Fix suspicious code in fixregex()	2020-09-09 19:12:28 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile	Linux 5.4.63	2020-09-05 11:22:51 +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.