linux

mirror of https://github.com/torvalds/linux.git synced 2026-06-13 01:08:08 +02:00

Linux kernel source tree

Go to file

Arvind Sankar b207caff41 compiler.h: fix barrier_data() on clang commit `3347acc6fc` upstream. Commit `815f0ddb34` ("include/linux/compiler.h: make compiler-.h mutually exclusive") neglected to copy barrier_data() from compiler-gcc.h into compiler-clang.h. The definition in compiler-gcc.h was really to work around clang's more aggressive optimization, so this broke barrier_data() on clang, and consequently memzero_explicit() as well. For example, this results in at least the memzero_explicit() call in lib/crypto/sha256.c:sha256_transform() being optimized away by clang. Fix this by moving the definition of barrier_data() into compiler.h. Also move the gcc/clang definition of barrier() into compiler.h, __memory_barrier() is icc-specific (and barrier() is already defined using it in compiler-intel.h) and doesn't belong in compiler.h. [rdunlap@infradead.org: fix ALPHA builds when SMP is not enabled] Link: https://lkml.kernel.org/r/20201101231835.4589-1-rdunlap@infradead.org Fixes: `815f0ddb34` ("include/linux/compiler.h: make compiler-.h mutually exclusive") Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: <stable@vger.kernel.org> Link: https://lkml.kernel.org/r/20201014212631.207844-1-nivedita@alum.mit.edu Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [nd: backport to account for missing commit `e506ea4512` ("compiler.h: Split {READ,WRITE}_ONCE definitions out into rwonce.h") commit `d08b9f0ca6` ("scs: Add support for Clang's Shadow Call Stack (SCS)") commit `a3f8a30f3f` ("Compiler Attributes: use feature checks instead of version checks")] Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-12-30 11:25:40 +01:00
arch	x86/apic/vector: Fix ordering in vector assignment	2020-12-30 11:25:40 +01:00
block	blk-cgroup: Pre-allocate tree node on blkg_conf_prep	2020-11-10 12:35:59 +01:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: algif_skcipher - EBUSY on aio should be an error	2020-10-29 09:55:01 +01:00
Documentation	dt-bindings: net: correct interrupt flags in examples	2020-12-08 10:18:55 +01:00
drivers	scsi: be2iscsi: Revert "Fix a theoretical leak in beiscsi_create_eqs()"	2020-12-30 11:25:39 +01:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	gfs2: check for empty rgrp tree in gfs2_ri_update	2020-12-11 13:25:04 +01:00
include	compiler.h: fix barrier_data() on clang	2020-12-30 11:25:40 +01:00
init	printk: reduce LOG_BUF_SHIFT range for H8300	2020-11-05 11:08:41 +01:00
ipc	ipc/util.c: sysvipc_find_ipc() incorrectly updates position index	2020-05-20 08:18:40 +02:00
kernel	tracing: Fix userstacktrace option for instances	2020-12-11 13:25:03 +01:00
lib	random32: make prandom_u32() output unpredictable	2020-11-18 19:18:52 +01:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm/swapfile: do not sleep with a spin lock held	2020-12-11 13:25:02 +01:00
net	netfilter: nf_tables: avoid false-postive lockdep splat	2020-12-11 13:25:04 +01:00
samples	misc: vop: add round_up(x,4) for vring_size to avoid kernel panic	2020-10-30 10:38:29 +01:00
scripts	scripts/setlocalversion: make git describe output more reliable	2020-11-05 11:08:31 +01:00
security	selinux: Fix error return code in sel_ib_pkey_sid_slow()	2020-11-18 19:18:50 +01:00
sound	ALSA: hda/generic: Add option to enforce preferred_dacs pairs	2020-12-11 13:25:01 +01:00
tools	x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes	2020-12-11 13:25:02 +01:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace	2020-12-02 08:48:07 +01:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	Documentation/llvm: add documentation on building w/ Clang/LLVM	2020-09-26 18:01:31 +02:00
Makefile	Kbuild: do not emit debug info for assembly with LLVM_IAS=1	2020-12-30 11:25:37 +01:00
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.