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Masahiro Yamada 7d32358be8 kbuild: avoid split lines in .mod files
"xargs echo" is not a safe way to remove line breaks because the input
may exceed the command line limit and xargs may break it up into
multiple invocations of echo. This should never happen because
scripts/gen_autoksyms.sh expects all undefined symbols are placed in
the second line of .mod files.

One possible way is to replace "xargs echo" with
"sed ':x;N;$!bx;s/\n/ /g'" or something, but I rewrote the code by
using awk because it is more readable.

This issue was reported by Sami Tolvanen; in his Clang LTO patch set,
$(multi-used-m) is no longer an ELF object, but a thin archive that
contains LLVM bitcode files. llvm-nm prints out symbols for each
archive member separately, which results a lot of dupications, in some
places, beyond the system-defined limit.

This problem must be fixed irrespective of LTO, and we must ensure
zero possibility of having this issue.

Link: https://lkml.org/lkml/2020/12/1/1658
Reported-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
2020-12-06 21:09:28 +09:00
Documentation Staging/IIO fixes for 5.10-rc5 2020-11-22 11:58:49 -08:00
LICENSES
arch kbuild: Hoist '--orphan-handling' into Kconfig 2020-12-01 22:45:36 +09:00
block blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats 2020-11-14 11:17:34 -07:00
certs
crypto
drivers Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2020-11-22 14:36:06 -08:00
fs Couple of EFI fixes for v5.10: 2020-11-22 13:05:48 -08:00
include A couple of scheduler fixes: 2020-11-22 13:26:07 -08:00
init kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1 2020-12-01 22:46:06 +09:00
ipc
kernel A couple of scheduler fixes: 2020-11-22 13:26:07 -08:00
lib lib/strncpy_from_user.c: Mask out bytes after NUL terminator. 2020-11-19 11:56:16 -08:00
mm mm: fix madvise WILLNEED performance problem 2020-11-22 10:48:22 -08:00
net Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2020-11-19 12:26:10 -08:00
samples
scripts kbuild: avoid split lines in .mod files 2020-12-06 21:09:28 +09:00
security selinux/stable-5.10 PR 20201113 2020-11-14 12:04:02 -08:00
sound ASoC: Fixes for v5.11 2020-11-19 19:56:29 +01:00
tools seccomp fixes for v5.10-rc5 2020-11-21 10:24:05 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap mailmap: fix entry for Dmitry Baryshkov/Eremin-Solenikov 2020-11-14 11:26:03 -08:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1 2020-12-01 22:46:06 +09:00
Makefile kbuild: Hoist '--orphan-handling' into Kconfig 2020-12-01 22:45:36 +09:00
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.