13 Jan, 2012
1 commit
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module_param(bool) used to counter-intuitively take an int. In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.It's time to remove the int/unsigned int option. For this version
it'll simply give a warning, but it'll break next kernel version.Signed-off-by: Rusty Russell
17 May, 2011
1 commit
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The init and exit sections should not be traced and adding a call to
mcount to them is a waste of text and instruction cache. Have the
macro section attributes include notrace to ignore these functions
for tracing from the build.Link: http://lkml.kernel.org/r/20110421023738.953028219@goodmis.org
Signed-off-by: Steven Rostedt
23 Oct, 2010
1 commit
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The __ref* tags may have been confusing for new kernel
developers (I was confused by them for sure) so adding a few
more sentences to comment to clear things up for people who
see those for the first time.Signed-off-by: Michal Nazarewicz
Acked-by: Uwe Kleine-König
Acked-by: Sam Ravnborg
Signed-off-by: Greg Kroah-Hartman
03 Mar, 2010
1 commit
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Signed-off-by: Denys Vlasenko
Signed-off-by: Michal Marek
16 Dec, 2009
1 commit
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In order to diagnose overall suspend/resume times, we need
basic instrumentation to break down the total time into per
device timing, similar to initcall_debug.This patch adds the basic timing instrumentation, needed
for a scritps/bootgraph.pl equivalent or humans.
The bootgraph.pl program is still a work in progress, but
is far enough along to know that this patch is sufficient.Signed-off-by: Arjan van de Ven
Signed-off-by: Rafael J. Wysocki
02 Oct, 2009
1 commit
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Complete the early_initcall() API by making it available in modules
too. To be used by the EDAC/MCE code.Signed-off-by: Borislav Petkov
Acked-by: Linus Torvalds
Cc: Andi Kleen
LKML-Reference:
Signed-off-by: Ingo Molnar
22 Aug, 2009
1 commit
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Some of the NOPs tables aren't used on 64-bits, quite some code and
data is needed post-init for module loading only, and a couple of
functions aren't used outside that file (i.e. can be static, and don't
need to be exported).The change to __INITDATA/__INITRODATA is needed to avoid an assembler
warning.Signed-off-by: Jan Beulich
LKML-Reference:
Acked-by: Sam Ravnborg
Signed-off-by: H. Peter Anvin
19 Jun, 2009
1 commit
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Call constructors (gcc-generated initcall-like functions) during kernel
start and module load. Constructors are e.g. used for gcov data
initialization.Disable constructor support for usermode Linux to prevent conflicts with
host glibc.Signed-off-by: Peter Oberparleiter
Acked-by: Rusty Russell
Acked-by: WANG Cong
Cc: Sam Ravnborg
Cc: Jeff Dike
Cc: Andi Kleen
Cc: Huang Ying
Cc: Li Wei
Cc: Michael Ellerman
Cc: Ingo Molnar
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jun, 2009
1 commit
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Now we have __initconst, we can finally move the external declarations for
the various Linux logo structures to .James' ack dates back to the previous submission (way to long ago), when the
logos were still __initdata, which caused failures on some platforms with some
toolchain versions.Signed-off-by: Geert Uytterhoeven
Acked-by: James Simmons
Cc: Krzysztof Helt
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Jun, 2009
1 commit
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Updated after review by Tim Abbott.
- Use HEAD_TEXT_SECTION
- Drop use of section-names.h and delete file
- Introduce EXIT_CALLDeleting section-names.h required a few simple
updates of init.hSigned-off-by: Sam Ravnborg
Cc: Tim Abbott
10 Jun, 2009
1 commit
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- add .init.rodata to INIT_DATA, and group all initconst flavors
together
- move strings generated from __setup_param() into .init.rodata
- add .*init.rodata to modpost's sets of init sections
- make modpost warn about references between meminit and cpuinit
as well as memexit and cpuexit sections (as CPU and memory
hotplug are independently selectable features)Signed-off-by: Jan Beulich
Signed-off-by: Sam Ravnborg
28 Apr, 2009
1 commit
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The old refok sections
.text.init.refok
.data.init.refok
.exit.text.refokhave been deprecated since commit
312b1485fb509c9bc32eda28ad29537896658cb8. After the other patches in
this patch series nothing is put in these sections, so clean things up
by eliminating all the remaining references to them.Signed-off-by: Tim Abbott
Acked-by: Sam Ravnborg
Signed-off-by: Linus Torvalds
27 Apr, 2009
1 commit
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This patch is preparation for replacing all uses of ".head.text" or
".text.head" in the kernel with macros, so that the section name can
later be changed without having to touch a lot of the kernel.Since some linker scripts do more complex things than referencing
HEAD_TEXT, we add a HEAD_TEXT_SECTION macro that just contains the
actual name.I've defined HEAD_TEXT_SECTION in a new header,
include/linux/section-names.h, so that this section name only needs to
appear in one place. I anticipate creating similar macro structures
for a number of other section names.The long-term goal here is to be able to change the kernel's magic
section names to those that are compatible with -ffunction-sections
-fdata-sections. This requires renaming all magic sections with names
of the form ".text.foo".Signed-off-by: Tim Abbott
Signed-off-by: Linus Torvalds
17 Apr, 2009
1 commit
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V3 of the early platform driver implementation.
Platform drivers are great for embedded platforms because we can separate
driver configuration from the actual driver. So base addresses,
interrupts and other configuration can be kept with the processor or board
code, and the platform driver can be reused by many different platforms.For early devices we have nothing today. For instance, to configure early
timers and early serial ports we cannot use platform devices. This
because the setup order during boot. Timers are needed before the
platform driver core code is available. The same goes for early printk
support. Early in this case means before initcalls.These early drivers today have their configuration either hard coded or
they receive it using some special configuration method. This is working
quite well, but if we want to support both regular kernel modules and
early devices then we need to have two ways of configuring the same
driver. A single way would be better.The early platform driver patch is basically a set of functions that allow
drivers to register themselves and architecture code to locate them and
probe. Registration happens through early_param(). The time for the
probe is decided by the architecture code.See Documentation/driver-model/platform.txt for more details.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Magnus Damm
Cc: Paul Mundt
Cc: Kay Sievers
Cc: David Brownell
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman
30 Oct, 2008
1 commit
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Add rodata equivalents for assembly use, and fix the section attributes
used by __REFCONST.Signed-off-by: Jan Beulich
Signed-off-by: Andrew Morton
Signed-off-by: Sam Ravnborg
21 Oct, 2008
1 commit
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…l/git/tip/linux-2.6-tip
* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits)
tracing/fastboot: improve help text
tracing/stacktrace: improve help text
tracing/fastboot: fix initcalls disposition in bootgraph.pl
tracing/fastboot: fix bootgraph.pl initcall name regexp
tracing/fastboot: fix issues and improve output of bootgraph.pl
tracepoints: synchronize unregister static inline
tracepoints: tracepoint_synchronize_unregister()
ftrace: make ftrace_test_p6nop disassembler-friendly
markers: fix synchronize marker unregister static inline
tracing/fastboot: add better resolution to initcall debug/tracing
trace: add build-time check to avoid overrunning hex buffer
ftrace: fix hex output mode of ftrace
tracing/fastboot: fix initcalls disposition in bootgraph.pl
tracing/fastboot: fix printk format typo in boot tracer
ftrace: return an error when setting a nonexistent tracer
ftrace: make some tracers reentrant
ring-buffer: make reentrant
ring-buffer: move page indexes into page headers
tracing/fastboot: only trace non-module initcalls
ftrace: move pc counter in irqtrace
...Manually fix conflicts:
- init/main.c: initcall tracing
- kernel/module.c: verbose level vs tracepoints
- scripts/bootgraph.pl: fallout from cherry-picking commits.
17 Oct, 2008
1 commit
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This macro appears to have been unused for ages, and there are no
invocations of it anywhere in the source tree.Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Oct, 2008
1 commit
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When a mcount pointer is recorded into a table, it is used to add or
remove calls to mcount (replacing them with nops). If the code is removed
via removing a module, the pointers still exist. At modifying the code
a check is always made to make sure the code being replaced is the code
expected. In-other-words, the code being replaced is compared to what
it is expected to be before being replaced.There is a very small chance that the code being replaced just happens
to look like code that calls mcount (very small since the call to mcount
is relative). To remove this chance, this patch adds ftrace_release to
allow module unloading to remove the pointers to mcount within the module.Another change for init calls is made to not trace calls marked with
__init. The tracing can not be started until after init is done anyway.Signed-off-by: Steven Rostedt
Signed-off-by: Ingo Molnar
12 Aug, 2008
1 commit
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The kernel has this really nice facility where if you put "initcall_debug"
on the kernel commandline, it'll print which function it's going to
execute just before calling an initcall, and then after the call completes
it will1) print if it had an error code
2) checks for a few simple bugs (like leaving irqs off)
and3) print how long the init call took in milliseconds.
While trying to optimize the boot speed of my laptop, I have been loving
number 3 to figure out what to optimize... ... and then I wished that
the same thing was done for module loading.This patch makes the module loader use this exact same functionality; it's
a logical extension in my view (since modules are just sort of late
binding initcalls anyway) and so far I've found it quite useful in finding
where things are too slow in my boot.Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Rusty Russell
27 Jul, 2008
1 commit
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Added early initcall (pre-SMP) support, using an identical interface to
that of regular initcalls. Functions called from do_pre_smp_initcalls()
could be converted to use this cleaner interface.This is required by CPU hotplug, because early users have to register
notifiers before going SMP. One such CPU hotplug user is the relay
interface with buffer-only channels, which needs to register such a
notifier, to be usable in early code. This in turn is used by kmemtrace.Signed-off-by: Eduard - Gabriel Munteanu
Cc: Tom Zanussi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2008
1 commit
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Remove apparently obsolete content from init.h referring to gcc 2.9x
and to "no_module_init".Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Apr, 2008
1 commit
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Add a proper extern for late_time_init in include/linux/init.h
Signed-off-by: Adrian Bunk
Acked-by: Ingo Molnar
Cc: Thomas Gleixner
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Feb, 2008
1 commit
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When adding __devinitconst etc. the __initconst variant
were missed.
Add this one and proper definitions for .head.text for use
in .S files.
The naming .head.text is preferred over .text.head as the
latter will conflict for a function named head when introducing
-ffunctions-sections.Signed-off-by: Sam Ravnborg
07 Feb, 2008
1 commit
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Signed-off-by: Ingo Molnar
03 Feb, 2008
1 commit
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Commit 312b1485fb509c9bc32eda28ad29537896658cb8 made __INIT_REFOK expand
into .section .section ".ref.text", "ax". Since the assembler doesn't
tolerate stuttering in the source that broke all MIPS builds.Since with this change Sam downgraded __INIT_REFOK to just a backward
compat thing and there being only a single use in the MIPS arch code the
best solution is to delete both of __INIT_REFOK and __INITDATA_REFOK (which
was equally broken) being unused anyway these can be deleted.Signed-off-by: Ralf Baechle
Signed-off-by: Sam Ravnborg
29 Jan, 2008
4 commits
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Today we have the following annotations for functions/data
referencing __init/__exit functions / data:__init_refok => for init functions
__initdata_refok => for init data
__exit_refok => for exit functionsThere is really no difference between the __init and __exit
versions and simplify it and to introduce a shorter annotation
the following new annotations are introduced:__ref => for functions (code) that
references __*init / __*exit
__refdata => for variables
__refconst => for const variablesWhit this annotation is it more obvious what the annotation
is for and there is no longer the arbitary division
between __init and __exit code.The mechanishm is the same as before - a special section
is created which is made part of the usual sections
in the linker script.We will start to see annotations like this:
-static struct pci_serial_quirk pci_serial_quirks[] = {
+static const struct pci_serial_quirk pci_serial_quirks[] __refconst = {
-----------------
-static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier =
+static struct notifier_block cpuid_class_cpu_notifier __refdata =
----------------
-static int threshold_cpu_callback(struct notifier_block *nfb,
+static int __ref threshold_cpu_callback(struct notifier_block *nfb,[The above is just random samples].
Note: No modifications were needed in modpost
to support the new sections due to the newly introduced
blacklisting.Signed-off-by: Sam Ravnborg
-
Remove the deprecated __attribute_used__.
[Introduce __section in a few places to silence checkpatch /sam]
Signed-off-by: Adrian Bunk
Signed-off-by: Sam Ravnborg -
Introducing separate sections for __dev* (HOTPLUG),
__cpu* (HOTPLUG_CPU) and __mem* (MEMORY_HOTPLUG)
allows us to do a much more reliable Section mismatch
check in modpost. We are no longer dependent on the actual
configuration of for example HOTPLUG.This has the effect that all users see much more
Section mismatch warnings than before because they
were almost all hidden when HOTPLUG was enabled.
The advantage of this is that when building a piece
of code then it is much more likely that the Section
mismatch errors are spotted and the warnings will be
felt less random of nature.Signed-off-by: Sam Ravnborg
Cc: Greg KH
Cc: Randy Dunlap
Cc: Adrian Bunk -
Add a new helper: __section() that makes a section definition
much shorter and more readable.Signed-off-by: Sam Ravnborg
17 Oct, 2007
2 commits
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__setup_str_* are referenced only during boot, hence there's no need to
waste image space for aligning these strings (with the aim of improving
performance).Signed-off-by: Jan Beulich
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I need __INIT_REFOK to fix a MODPOST warning for a few MIPS configs which
have to call init code from .text very early in the game due to bootloader
issues. __INITDATA_REFOK is just for consistency.Signed-off-by: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Oct, 2007
1 commit
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With the net namespaces many code leaved the __init section,
thus making the kernel occupy more memory than it did before.
Since we have a config option that prohibits the namespace
creation, the functions that initialize/finalize some netns
stuff are simply not needed and can be freed after the boot.Currently, this is almost not noticeable, since few calls
are no longer in __init, but when the namespaces will be
merged it will be possible to free more code. I propose to
use the __net_init, __net_exit and __net_initdata "attributes"
for functions/variables that are not used if the CONFIG_NET_NS
is not set to save more space in memory.The exiting functions cannot just reside in the __exit section,
as noticed by David, since the init section will have
references on it and the compilation will fail due to modpost
checks. These references can exist, since the init namespace
never dies and the exit callbacks are never called. So I
introduce the __exit_refok attribute just like it is already
done with the __init_refok.Signed-off-by: Pavel Emelyanov
Signed-off-by: David S. Miller
12 Aug, 2007
1 commit
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gcc currently doesn't support attributes on types, so we can't use it
function pointers. This avoids some warnings on a gcc 4.3 build.Signed-off-by: Andi Kleen
Signed-off-by: Linus Torvalds
01 Aug, 2007
1 commit
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pure_initcall uses the same ID as core_initcall. I guess that's a typo and
it should use its own ID.Signed-off-by: Michael Buesch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Jul, 2007
1 commit
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gcc 4.3 supports a new __attribute__((__cold__)) to mark functions cold. Any
path directly leading to a call of this function will be unlikely. And gcc
will try to generate smaller code for the function itself.Please use with care. The code generation advantage isn't large and in most
cases it is not worth uglifying code with this.This patch marks some common error functions like panic(), printk()
as cold. This will longer term make many unlikely()s unnecessary, although
we can keep them for now for older compilers.BUG is not marked cold because there is currently no way to tell
gcc to mark a inline function told.Also all __init and __exit functions are marked cold. With a non -Os
build this will tell the compiler to generate slightly smaller code
for them. I think it currently only uses less alignments for labels,
but that might change in the future.One disadvantage over *likely() is that they cannot be easily instrumented
to verify them.Another drawback is that only the latest gcc 4.3 snapshots support this.
Unfortunately we cannot detect this using the preprocessor. This means older
snapshots will fail now. I don't think that's a problem because they are
unreleased compilers that nobody should be using.gcc also has a __hot__ attribute, but I don't see any sense in using
this in the kernel right now. But someday I hope gcc will be able
to use more aggressive optimizing for hot functions even in -Os,
if that happens it should be added.Includes compile fix from Thomas Gleixner.
Cc: Jan Hubicka
Signed-off-by: Andi Kleen
Signed-off-by: Linus Torvalds
17 Jul, 2007
1 commit
-
Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 May, 2007
1 commit
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Throughout the kernel there are a few legitimite references
to init or exit sections. Most of these are covered by the
patterns included in modpost but a few nees special attention.
To avoid hardcoding a lot of function names in modpost introduce
a marker so relevant function/data can be marked.
When modpost see a reference to a init/exit function from
a function/data marked no warning will be issued.Idea from: Andrew Morton
Signed-off-by: Sam Ravnborg
Cc: Andrew Morton
15 May, 2007
1 commit
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After examining what was checked in and the code base I discovered that most
of 86c0baf123e474b6eb404798926ecf62b426bf3a wasn't necessary anymore....So here's a patch that reverts the last part of that changeset:
Revert part of 86c0baf123e474b6eb404798926ecf62b426bf3a.
The kernel has moved forward to a state where the original change is not
necessary. After porting forward, this final version of the patch was
applied and broke non-x86 architectures.Signed-off-by: Prarit Bhargava
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
1 commit
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Add a proper protype for prepare_namespace() in include/linux/init.h.
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2007
1 commit
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Remove software_suspend() and all its users since
pm_suspend(PM_SUSPEND_DISK) should be equivalent and there's no point in
having two interfaces for the same thing.The patch also changes the valid_state function to return 0 (false) for
PM_SUSPEND_DISK when SOFTWARE_SUSPEND is not configured instead of
accepting it and having the whole thing fail later.Signed-off-by: Johannes Berg
Acked-by: "Rafael J. Wysocki"
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
