linux-toradex.git/arch/parisc/configs, branch v4.9.40

mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS

2016-08-30T17:10:21+00:00

There are three usercopy warnings which are currently being silenced for
gcc 4.6 and newer:

1) "copy_from_user() buffer size is too small" compile warning/error

   This is a static warning which happens when object size and copy size
   are both const, and copy size > object size.  I didn't see any false
   positives for this one.  So the function warning attribute seems to
   be working fine here.

   Note this scenario is always a bug and so I think it should be
   changed to *always* be an error, regardless of
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS.

2) "copy_from_user() buffer size is not provably correct" compile warning

   This is another static warning which happens when I enable
   __compiletime_object_size() for new compilers (and
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS).  It happens when object size
   is const, but copy size is *not*.  In this case there's no way to
   compare the two at build time, so it gives the warning.  (Note the
   warning is a byproduct of the fact that gcc has no way of knowing
   whether the overflow function will be called, so the call isn't dead
   code and the warning attribute is activated.)

   So this warning seems to only indicate "this is an unusual pattern,
   maybe you should check it out" rather than "this is a bug".

   I get 102(!) of these warnings with allyesconfig and the
   __compiletime_object_size() gcc check removed.  I don't know if there
   are any real bugs hiding in there, but from looking at a small
   sample, I didn't see any.  According to Kees, it does sometimes find
   real bugs.  But the false positive rate seems high.

3) "Buffer overflow detected" runtime warning

   This is a runtime warning where object size is const, and copy size >
   object size.

All three warnings (both static and runtime) were completely disabled
for gcc 4.6 with the following commit:

  2fb0815c9ee6 ("gcc4: disable __compiletime_object_size for GCC 4.6+")

That commit mistakenly assumed that the false positives were caused by a
gcc bug in __compiletime_object_size().  But in fact,
__compiletime_object_size() seems to be working fine.  The false
positives were instead triggered by #2 above.  (Though I don't have an
explanation for why the warnings supposedly only started showing up in
gcc 4.6.)

So remove warning #2 to get rid of all the false positives, and re-enable
warnings #1 and #3 by reverting the above commit.

Furthermore, since #1 is a real bug which is detected at compile time,
upgrade it to always be an error.

Having done all that, CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is no longer
needed.

Signed-off-by: Josh Poimboeuf 
Cc: Kees Cook 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H . Peter Anvin" 
Cc: Andy Lutomirski 
Cc: Steven Rostedt 
Cc: Brian Gerst 
Cc: Peter Zijlstra 
Cc: Frederic Weisbecker 
Cc: Byungchul Park 
Cc: Nilay Vaish 
Signed-off-by: Linus Torvalds

parisc: use the new LED disk activity trigger

2016-06-27T06:58:41+00:00

- platform: rename 'ide-disk' to 'disk-activity'

Signed-off-by: Stephan Linz 
Acked-by: Helge Deller 
Signed-off-by: Jacek Anaszewski

KEYS: CONFIG_KEYS_DEBUG_PROC_KEYS is no longer an option

2016-02-10T10:13:27+00:00

CONFIG_KEYS_DEBUG_PROC_KEYS is no longer an option as /proc/keys is now
mandatory if the keyrings facility is enabled (it's used by libkeyutils in
userspace).

The defconfig references were removed with:

	perl -p -i -e 's/CONFIG_KEYS_DEBUG_PROC_KEYS=y\n//' \
	    `git grep -l CONFIG_KEYS_DEBUG_PROC_KEYS=y`

and the integrity Kconfig fixed by hand.

Signed-off-by: David Howells 
cc: Andreas Ziegler 
cc: Dmitry Kasatkin

rtmutex: Delete scriptable tester

2015-07-20T09:45:45+00:00

No one uses this anymore, and this is not the first time the
idea of replacing it with a (now possible) userspace side.
Lock stealing logic was removed long ago in when the lock
was granted to the highest prio.

Signed-off-by: Davidlohr Bueso 
Cc: Darren Hart 
Cc: Steven Rostedt 
Cc: Mike Galbraith 
Cc: Paul E. McKenney 
Cc: Sebastian Andrzej Siewior 
Cc: Davidlohr Bueso 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1435782588-4177-2-git-send-email-dave@stgolabs.net
Signed-off-by: Thomas Gleixner

parisc: Update defconfigs which were missing CONFIG_NET.

2014-09-24T18:34:29+00:00

Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of
'select'.")  removed what happened to be the only instance of 'select
NET'. Defconfigs that were relying on the select now lack networking
support.

Signed-off-by: David S. Miller

parisc: Set CONFIG_NET=y in defconfigs

2014-09-24T17:38:29+00:00

Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.

Reported-by: Stephen Rothwell 
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Michal Marek 
Signed-off-by: David S. Miller

staging: silicom: remove driver

2014-07-27T18:24:37+00:00

The driver hasn't been cleaned up and it doesn't look like anyone is
working on it anymore (including the original author). So remove it.
If someone wants to work on cleaning the driver up and moving it out of
staging, this commit can be reverted.

In addition, since this removes the CONFIG_NET_VENDOR_SILICOM config
symbol, remove the symbol from all defconfig files that reference it.

Signed-off-by: Kristina Martšenko 
Cc: Daniel Cotey 
Signed-off-by: Greg Kroah-Hartman

USB: remove CONFIG_USB_DEBUG from defconfig files

2014-05-28T16:40:45+00:00

Now that CONFIG_USB_DEBUG is gone, remove it from a number of defconfig
files that were enabling it.

Signed-off-by: Greg Kroah-Hartman

USB: delete CONFIG_USB_DEVICEFS from defconfig

2014-05-27T23:07:13+00:00

It no longer occurs in Kconfig.
USB: remove CONFIG_USB_DEVICEFS(fb28d58b) leaked remove defconfig.

Signed-off-by: Naoki MATSUMOTO 
Signed-off-by: Greg Kroah-Hartman

parisc: update 64bit defconfigs and use SIL680 instead of SIIMAGE driver

2013-12-03T22:23:35+00:00

Signed-off-by: Helge Deller