16 Jul, 2020
1 commit
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Just like the NFS and CIFS root code this better lives with the
driver it is tightly integrated with.Signed-off-by: Christoph Hellwig
Acked-by: Song Liu
Acked-by: Linus Torvalds
12 May, 2020
1 commit
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scripts/mkcompile_h runs $(CC) just for getting the version string.
Reuse CONFIG_CC_VERSION_TEXT for optimization.For GCC, this slightly changes the version string. I do not think it
is a big deal as we do not have the defined format for LINUX_COMPILER.
In fact, the recent commit 4dcc9a88448a ("kbuild: mkcompile_h:
Include $LD version in /proc/version") added the linker version.Signed-off-by: Masahiro Yamada
08 Apr, 2020
2 commits
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scripts/mkcompile_h uses $(CC) only for getting the version string.
I suspected there was a specific reason why the additional flags were
needed, and dug the commit history. This code dates back to at least
2002 [1], but I could not get any more clue.Just get rid of it.
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?id=29f3df7eba8ddf91a55183f9967f76fbcc3ab742
Signed-off-by: Masahiro Yamada
Reviewed-by: Kees Cook -
When doing Clang builds of the kernel, it is possible to link with
either ld.bfd (binutils) or ld.lld (LLVM), but it is not possible to
discover this from a running kernel. Add the "$LD -v" output to
/proc/version.Signed-off-by: Kees Cook
Reviewed-by: Nick Desaulniers
Tested-by: Nick Desaulniers
Reviewed-by: Nathan Chancellor
Tested-by: Nathan Chancellor
Reviewed-by: Fangrui Song
Reviewed-by: Sedat Dilek
Tested-by: Sedat Dilek
Signed-off-by: Masahiro Yamada
14 Aug, 2019
1 commit
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Update the build scripts and the version magic to reflect when
CONFIG_PREEMPT_RT is enabled in the same way as CONFIG_PREEMPT is treated.The resulting version strings:
Linux m 5.3.0-rc1+ #100 SMP Fri Jul 26 ...
Linux m 5.3.0-rc1+ #101 SMP PREEMPT Fri Jul 26 ...
Linux m 5.3.0-rc1+ #102 SMP PREEMPT_RT Fri Jul 26 ...The module vermagic:
5.3.0-rc1+ SMP mod_unload modversions
5.3.0-rc1+ SMP preempt mod_unload modversions
5.3.0-rc1+ SMP preempt_rt mod_unload modversionsSigned-off-by: Thomas Gleixner
Signed-off-by: Masahiro Yamada
10 Jan, 2018
1 commit
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Construct the init thread stack in the linker script rather than doing it
by means of a union so that ia64's init_task.c can be got rid of.The following symbols are then made available from INIT_TASK_DATA() linker
script macro:init_thread_union
init_stackINIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the
size of the init stack. init_thread_union is given its own section so that
it can be placed into the stack space in the right order. I'm assuming
that the ia64 ordering is correct and that the task_struct is first and the
thread_info second.Signed-off-by: David Howells
Tested-by: Tony Luck
Tested-by: Will Deacon (arm64)
Tested-by: Palmer Dabbelt
Acked-by: Thomas Gleixner
02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
09 Sep, 2016
1 commit
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Introduce LD_DEAD_CODE_DATA_ELIMINATION option for architectures to
select to build with -ffunction-sections, -fdata-sections, and link
with --gc-sections. It requires some work (documented) to ensure all
unreferenced entrypoints are live, and requires toolchain and build
verification, so it is made a per-arch option for now.On a random powerpc64le build, this yelds a significant size saving,
it boots and runs fine, but there is a lot I haven't tested as yet, so
these savings may be reduced if there are bugs in the link.text data bss dec filename
11169741 1180744 1923176 14273661 vmlinux
10445269 1004127 1919707 13369103 vmlinux.dce~700K text, ~170K data, 6% removed from kernel image size.
Signed-off-by: Nicholas Piggin
Signed-off-by: Michal Marek
05 May, 2012
2 commits
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Now that all archs except ia64 are converted, replace the config and
let the ia64 select CONFIG_ARCH_INIT_TASKSigned-off-by: Thomas Gleixner
Link: http://lkml.kernel.org/r/20120503085035.867948914@linutronix.de -
All archs define init_task in the same way (except ia64, but there is
no particular reason why ia64 cannot use the common version). Create a
generic instance so all archs can be converted over.The config switch is temporary and will be removed when all archs are
converted over.Signed-off-by: Thomas Gleixner
Cc: Benjamin Herrenschmidt
Cc: Chen Liqin
Cc: Chris Metcalf
Cc: Chris Zankel
Cc: David Howells
Cc: David S. Miller
Cc: Geert Uytterhoeven
Cc: Guan Xuetao
Cc: Haavard Skinnemoen
Cc: Hirokazu Takata
Cc: James E.J. Bottomley
Cc: Jesper Nilsson
Cc: Jonas Bonn
Cc: Mark Salter
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Matt Turner
Cc: Michal Simek
Cc: Mike Frysinger
Cc: Paul Mundt
Cc: Ralf Baechle
Cc: Richard Kuo
Cc: Richard Weinberger
Cc: Russell King
Cc: Yoshinori Sato
Link: http://lkml.kernel.org/r/20120503085034.092585287@linutronix.de
12 Dec, 2009
1 commit
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Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek
12 Feb, 2008
1 commit
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When make -s support were added to filechk to
combination created with make V=1 were not
covered.
Fix it by explicitly cover this case too.Signed-off-by: Sam Ravnborg
Cc: Mike Frysinger
09 Feb, 2008
1 commit
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Signed-off-by: Mike Frysinger
Signed-off-by: Sam Ravnborg
15 Oct, 2007
1 commit
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The variable CFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
tree and enabling one to use:
make CFLAGS=...
to specify additional gcc commandline options.One usecase is when trying to find gcc bugs but other
use cases has been requested too.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68kTest was simple to do a defconfig build, apply the patch and check
that nothing got rebuild.Signed-off-by: Sam Ravnborg
12 Feb, 2007
1 commit
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The file init/initramfs.c is always compiled and linked in the kernel
vmlinux even when BLK_DEV_RAM and BLK_DEV_INITRD are disabled and the
system isn't using any form of an initramfs or initrd. In this situation
the code is only used to unpack a (static) default initial rootfilesystem.
The current init/initramfs.c code. usr/initramfs_data.o compiles to a size
of ~15 kbytes. Disabling BLK_DEV_RAM and BLK_DEV_INTRD shrinks the kernel
code size with ~60 Kbytes.This patch avoids compiling in the code and data for initramfs support if
CONFIG_BLK_DEV_INITRD is not defined. Instead of the initramfs code and
data it uses a small routine in init/noinitramfs.c to setup an initial
static default environment for mounting a rootfilesystem later on in the
kernel initialisation process. The new code is: 164 bytes of size.The patch is separated in two parts:
1) doesn't compile initramfs code when CONFIG_BLK_DEV_INITRD is not set
2) changing all plaforms vmlinux.lds.S files to not reserve an area of
PAGE_SIZE when CONFIG_BLK_DEV_INITRD is not set.[deweerdt@free.fr: warning fix]
Signed-off-by: Jean-Paul Saman
Cc: Al Viro
Cc:
Signed-off-by: Frederik Deweerdt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jan, 2007
1 commit
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Revert previous attempts at messing with the linux banner string and
simply use a separate format string for proc.Signed-off-by: Roman Zippel
Acked-by: Olaf Hering
Acked-by: Jean Delvare
Cc: Andrey Borzenkov
Cc: Andrew Morton
Cc: Andy Whitcroft
Cc: Herbert Poetzl
Signed-off-by: Linus Torvalds
23 Dec, 2006
1 commit
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compile.h is created super-late in the build. But proc_misc.c want to include
it, and it's generally not sane to have a header file in include/linux be
created at the end of the build: it's either not present or, worse, wrong for
most of the build.So the patch arranges for compile.h to be built at the start of the build
process. It also consolidates the compile.h rules with those for version.h
and utsname.h, so they all get built together.I hope. My chances of having got this right are about 2%.
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Dec, 2006
1 commit
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utsname information is shown in the linux banner, which also is used for
/proc/version (which can have different utsname values inside a uts
namespaces). this patch makes the varying data arguments and changes the
string to a format string, using those arguments.Signed-off-by: Herbert Poetzl
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jun, 2006
1 commit
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This patch removes the devfs code from the init/ directory.
Signed-off-by: Greg Kroah-Hartman
15 Jul, 2005
1 commit
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From: Matt Mackall
Add PREEMPT to UTS_VERSION where enabled as is done for SMP to make
preempt kernels easily identifiable.
Added SMP PREEMPT as comment in compile.h to force it to be
updated when they change (sam).Signed-off-by: Matt Mackall
Signed-off-by: Sam Ravnborg
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
