linux-toradex.git/include/linux/module.h, branch v2.6.27.31

module: remove over-zealous check in __module_get()

2009-02-12T17:31:02+00:00

commit 7f9a50a5b89b87f8e754f59ae9968da28be618a5 upstream.

Impact: fix spurious BUG_ON() triggered under load

module_refcount() isn't reliable outside stop_machine(), as demonstrated
by Karsten Keil , networking can trigger it under load
(an inc on one cpu and dec on another while module_refcount() is tallying
 can give false results, for example).

Almost noone should be using __module_get, but that's another issue.

Cc: Karsten Keil 
Signed-off-by: Rusty Russell 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

remove the v850 port

2008-07-24T17:47:24+00:00

Trying to compile the v850 port brings many compile errors, one of them exists
since at least kernel 2.6.19.

There also seems to be noone willing to bring this port back into a usable
state.

This patch therefore removes the v850 port.

If anyone ever decides to revive the v850 port the code will still be
available from older kernels, and it wouldn't be impossible for the port to
reenter the kernel if it would become actively maintained again.

Signed-off-by: Adrian Bunk 
Acked-by: Greg Ungerer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

module: turn longs into ints for module sizes

2008-07-22T09:24:27+00:00

This shrinks module.o and each *.ko file.

And finally, structure members which hold length of module
code (four such members there) and count of symbols
are converted from longs to ints.

We cannot possibly have a module where 32 bits won't
be enough to hold such counts.

For one, module loading checks module size for sanity
before loading, so such insanely big module will fail
that test first.

Signed-off-by: Denys Vlasenko 
Signed-off-by: Rusty Russell

Shrink struct module: CONFIG_UNUSED_SYMBOLS ifdefs

2008-07-22T09:24:27+00:00

module.c and module.h conatains code for finding
exported symbols which are declared with EXPORT_UNUSED_SYMBOL,
and this code is compiled in even if CONFIG_UNUSED_SYMBOLS is not set
and thus there can be no EXPORT_UNUSED_SYMBOLs in modules anyway
(because EXPORT_UNUSED_SYMBOL(x) are compiled out to nothing then).

This patch adds required #ifdefs.

Signed-off-by: Denys Vlasenko 
Signed-off-by: Rusty Russell

module: reorder struct module to save space on 64 bit builds

2008-07-22T09:24:26+00:00

reorder struct module to save space on 64 bit builds.
saves 1 cacheline_size  (128 on default x86_64 & 64 on AMD
Opteron/athlon) when CONFIG_MODULE_UNLOAD=y.

Signed-off-by: Richard Kennedy 
Signed-off-by: Rusty Russell

module: reduce module image and resident size

2008-05-01T11:14:59+00:00

Resulting reduction (x86-64, gcc 4.1.2) with my (special purpose, i.e.
much reduced) configurations:
- 16k kernel resident size
- 180k module resident size
- 10k module image size

Signed-off-by: Jan Beulich 
Signed-off-by: Rusty Russell

module: make module_sect_attrs private to kernel/module.c

2008-05-01T11:14:59+00:00

No-one else is using these afaics.

Signed-off-by: Jan Beulich 
Signed-off-by: Rusty Russell

fix module_update_markers() compile error

2008-02-15T04:58:04+00:00

This patch fixes the following compile error with CONFIG_MODULES=n
caused by commit fb40bd78b0f91b274879cf5db8facd1e04b6052e:

/home/bunk/linux/kernel-2.6/git/linux-2.6/kernel/marker.c: In function `marker_update_probes':
/home/bunk/linux/kernel-2.6/git/linux-2.6/kernel/marker.c:627: error: too few arguments to function `module_update_markers'

Signed-off-by: Adrian Bunk 
Acked-by: Mathieu Desnoyers 
Cc: Paul Mundt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Linux Kernel Markers: support multiple probes

2008-02-14T00:21:20+00:00

RCU style multiple probes support for the Linux Kernel Markers.  Common case
(one probe) is still fast and does not require dynamic allocation or a
supplementary pointer dereference on the fast path.

- Move preempt disable from the marker site to the callback.

Since we now have an internal callback, move the preempt disable/enable to the
callback instead of the marker site.

Since the callback change is done asynchronously (passing from a handler that
supports arguments to a handler that does not setup the arguments is no
arguments are passed), we can safely update it even if it is outside the
preempt disable section.

- Move probe arm to probe connection. Now, a connected probe is automatically
  armed.

Remove MARK_MAX_FORMAT_LEN, unused.

This patch modifies the Linux Kernel Markers API : it removes the probe
"arm/disarm" and changes the probe function prototype : it now expects a
va_list * instead of a "...".

If we want to have more than one probe connected to a marker at a given
time (LTTng, or blktrace, ssytemtap) then we need this patch. Without it,
connecting a second probe handler to a marker will fail.

It allow us, for instance, to do interesting combinations :

Do standard tracing with LTTng and, eventually, to compute statistics
with SystemTAP, or to have a special trigger on an event that would call
a systemtap script which would stop flight recorder tracing.

Signed-off-by: Mathieu Desnoyers 
Cc: Christoph Hellwig 
Cc: Mike Mason 
Cc: Dipankar Sarma 
Cc: David Smith 
Cc: "Paul E. McKenney" 
Cc: "Frank Ch. Eigler" 
Cc: Steven Rostedt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fix "modules: make module_address_lookup() safe"

2008-02-08T17:22:24+00:00

Get the constness right, avoid nasty cast.

Cc: Ingo Molnar 
Cc: Kyle McMartin 
Cc: Rusty Russell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds