linux-stable.git/include/linux/init.h, branch linux-2.6.24.y

store __setup_str_* in a more compact way

2007-10-17T15:42:56+00:00

__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

Add assembler equivalents to __init{,date}_refok

2007-10-16T16:42:49+00:00

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

[NETNS]: Move some code into __init section when CONFIG_NET_NS=n

2007-10-10T23:54:58+00:00

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

x86_64: Don't mark exitcall as cold

2007-08-11T22:58:13+00:00

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

pure_initcall ID inconsistency

2007-07-31T22:39:41+00:00

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

x86: Support attribute((cold)) in gcc 4.3

2007-07-22T01:37:08+00:00

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

Remove final two references to "__obsolete_setup" macro

2007-07-16T16:05:48+00:00

Signed-off-by: Robert P. J. Day 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kbuild: introduce __init_refok/__initdata_refok to supress section mismatch warnings

2007-05-19T07:11:58+00:00

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

Remove cpu hotplug defines for INIT & INITDATA

2007-05-15T15:54:00+00:00

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

init/do_mounts.c: proper prepare_namespace() prototype

2007-05-08T18:15:00+00:00

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