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Lukas Bulwahn 90574a9c02 printk: remove unneeded dead-store assignment
make clang-analyzer on x86_64 defconfig caught my attention with:

  kernel/printk/printk_ringbuffer.c:885:3: warning:
  Value stored to 'desc' is never read [clang-analyzer-deadcode.DeadStores]

		desc = to_desc(desc_ring, head_id);
		^

Commit b6cf8b3f33 ("printk: add lockless ringbuffer") introduced
desc_reserve() with this unneeded dead-store assignment.

As discussed with John Ogness privately, this is probably just some minor
left-over from previous iterations of the ringbuffer implementation. So,
simply remove this unneeded dead assignment to make clang-analyzer happy.

As compilers will detect this unneeded assignment and optimize this anyway,
the resulting object code is identical before and after this change.

No functional change. No change to object code.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20201106034005.18822-1-lukas.bulwahn@gmail.com
2020-11-06 11:05:44 +01:00
arch MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
block - Improve DM core's bio splitting to use blk_max_size_offset(). Also 2020-10-14 15:05:38 -07:00
certs
crypto drivers-5.10-2020-10-12 2020-10-13 13:04:41 -07:00
Documentation MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
drivers MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
fs powerpc updates for 5.10 2020-10-16 12:21:15 -07:00
include kgdb patches for 5.10-rc1 2020-10-16 12:47:18 -07:00
init init/Kconfig: Fix CPU number in LOG_CPU_MAX_BUF_SHIFT description 2020-11-03 09:34:40 +01:00
ipc ipc: adjust proc_ipc_sem_dointvec definition to match prototype 2020-09-05 12:14:29 -07:00
kernel printk: remove unneeded dead-store assignment 2020-11-06 11:05:44 +01:00
lib kgdb patches for 5.10-rc1 2020-10-16 12:47:18 -07:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm Merge branch 'akpm' (patches from Andrew) 2020-10-16 11:31:55 -07:00
net networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
samples networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
scripts Merge branch 'akpm' (patches from Andrew) 2020-10-16 11:31:55 -07:00
security networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
sound dma-mapping updates for 5.10 2020-10-15 14:43:29 -07:00
tools powerpc updates for 5.10 2020-10-16 12:21:15 -07:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt KVM: fix memory leak in kvm_io_bus_unregister_dev() 2020-09-11 13:15:11 -04:00
.clang-format memblock: use separate iterators for memory and reserved regions 2020-10-13 18:38:35 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore .gitignore: docs: ignore sphinx_*/ directories 2020-09-10 10:44:31 -06:00
.mailmap MAINTAINERS: jarkko.sakkinen@linux.intel.com -> jarkko@kernel.org 2020-10-16 11:11:19 -07:00
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CREDITS networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
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MAINTAINERS MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
Makefile networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
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In order to build the documentation, use ``make htmldocs`` or
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There are various text files in the Documentation/ subdirectory,
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Please read the Documentation/process/changes.rst file, as it contains the
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