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Andrea Righi b102bcda07 x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y 
[ Upstream commit de979c8357 ]

With CONFIG_PREEMPTION disabled, arch/x86/entry/thunk_$(BITS).o becomes
an empty object file.

With some old versions of binutils (i.e., 2.35.90.20210113-1ubuntu1) the
GNU assembler doesn't generate a symbol table for empty object files and
objtool fails with the following error when a valid symbol table cannot
be found:

  arch/x86/entry/thunk_64.o: warning: objtool: missing symbol table

To prevent this from happening, build thunk_$(BITS).o only if
CONFIG_PREEMPTION is enabled.

BugLink: https://bugs.launchpad.net/bugs/1911359

Fixes: 320100a5ff ("x86/entry: Remove the TRACE_IRQS cruft")
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/Ys/Ke7EWjcX+ZlXO@arighi-desktop
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-19 17:52:48 +08:00
arch x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y 2023-04-19 17:52:48 +08:00
block block: ensure iov_iter advances for added pages 2023-04-19 17:52:40 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto crypto: memneq - move into lib/ 2023-04-19 17:50:35 +08:00
Documentation media: hevc: Embedded indexes in RPS 2023-04-19 17:52:24 +08:00
drivers video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock() 2023-04-19 17:52:48 +08:00
fs f2fs: fix to remove F2FS_COMPR_FL and tag F2FS_NOCOMP_FL at the same time 2023-04-19 17:52:47 +08:00
include sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed 2023-04-19 17:52:48 +08:00
init stack: Declare {randomize_,}kstack_offset to fix Sparse warnings 2023-04-19 17:52:12 +08:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2023-04-19 17:49:52 +08:00
kernel sched/core: Do not requeue task on CPU excluded from cpus_mask 2023-04-19 17:52:48 +08:00
lib lib/smp_processor_id: fix imbalanced instrumentation_end() call 2023-04-19 17:52:44 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/mmap.c: fix missing call to vm_unacct_memory in mmap_region 2023-04-19 17:52:39 +08:00
net net: 9p: fix refcount leak in p9_read_work() error handling 2023-04-19 17:52:44 +08:00
samples samples/landlock: Format with clang-format 2023-04-19 17:50:01 +08:00
scripts scripts/faddr2line: Fix vmlinux detection on arm64 2023-04-19 17:52:48 +08:00
security selinux: Add boundary check in put_entry() 2023-04-19 17:52:09 +08:00
sound ASoC: mchp-spdifrx: disable end of block interrupt on failures 2023-04-19 17:52:46 +08:00
tools tools/thermal: Fix possible path truncations 2023-04-19 17:52:48 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: Don't set Accessed/Dirty bits for ZERO_PAGE 2023-04-19 17:52:31 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Input: goodix - add a goodix.h header file 2023-04-19 17:50:59 +08:00
Makefile Makefile: link with -z noexecstack --no-warn-rwx-segments 2023-04-19 17:51:58 +08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.