linux-toradex.git/drivers/misc/ibmasm, branch v4.5

kbuild: Allow to specify composite modules with modname-m

2015-11-25T10:23:25+00:00

This allows to write

  drm-$(CONFIG_AGP) += drm_agpsupport.o

without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
this syntax for modules, since built-in code depending on something
modular cannot work and init/Makefile actually relies on the current
semantics. There are a few drivers which adapted to the current
semantics out of necessity; these are fixed to also work when the
respective subsystem is modular.

Acked-by: Peter Chen  [chipidea]
Signed-off-by: Michal Marek

misc: ibmasm: remove unnecessary pci_set_drvdata()

2013-09-26T16:13:54+00:00

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.

Signed-off-by: Jingoo Han 
Signed-off-by: Greg Kroah-Hartman

misc: ibmasm: Remove casting the return value which is a void pointer

2013-09-26T15:53:23+00:00

Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.

Signed-off-by: Jingoo Han 
Signed-off-by: Greg Kroah-Hartman

ibmasmfs: don't bother passing superblock when not needed

2013-09-04T02:52:50+00:00

Signed-off-by: Al Viro

fs: Limit sys_mount to only request filesystem modules.

2013-03-04T03:36:31+00:00

Modify the request_module to prefix the file system type with "fs-"
and add aliases to all of the filesystems that can be built as modules
to match.

A common practice is to build all of the kernel code and leave code
that is not commonly needed as modules, with the result that many
users are exposed to any bug anywhere in the kernel.

Looking for filesystems with a fs- prefix limits the pool of possible
modules that can be loaded by mount to just filesystems trivially
making things safer with no real cost.

Using aliases means user space can control the policy of which
filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf
with blacklist and alias directives.  Allowing simple, safe,
well understood work-arounds to known problematic software.

This also addresses a rare but unfortunate problem where the filesystem
name is not the same as it's module name and module auto-loading
would not work.  While writing this patch I saw a handful of such
cases.  The most significant being autofs that lives in the module
autofs4.

This is relevant to user namespaces because we can reach the request
module in get_fs_type() without having any special permissions, and
people get uncomfortable when a user specified string (in this case
the filesystem type) goes all of the way to request_module.

After having looked at this issue I don't think there is any
particular reason to perform any filtering or permission checks beyond
making it clear in the module request that we want a filesystem
module.  The common pattern in the kernel is to call request_module()
without regards to the users permissions.  In general all a filesystem
module does once loaded is call register_filesystem() and go to sleep.
Which means there is not much attack surface exposed by loading a
filesytem module unless the filesystem is mounted.  In a user
namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT,
which most filesystems do not set today.

Acked-by: Serge Hallyn 
Acked-by: Kees Cook 
Reported-by: Kees Cook 
Signed-off-by: "Eric W. Biederman"

misc: remove use of __devexit

2012-11-21T20:53:32+00:00

CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.

Signed-off-by: Bill Pemberton 
Cc: "Michał Mirosław" 
Cc: Wolfram Sang 
Cc: Eric Piel 
Cc: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

misc: remove use of __devinit

2012-11-21T20:51:53+00:00

CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton 
Cc: "Michał Mirosław" 
Cc: Eric Piel 
Cc: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

drivers/misc: remove use of __devexit_p

2012-11-21T20:49:50+00:00

CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.

Signed-off-by: Bill Pemberton 
Cc: "Michał Mirosław" 
Cc: Wolfram Sang 
Cc: Eric Piel 
Cc: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

8250: three way resolve of the 8250 diffs

2012-07-17T16:11:50+00:00

This resolves the differences between the original 8250 patch, the revised 8250 patch
and the independant clean up of the octeon driver (to use platform devices properly yay!)

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

simple_open: automatically convert to simple_open()

2012-04-05T22:25:50+00:00

Many users of debugfs copy the implementation of default_open() when
they want to support a custom read/write function op.  This leads to a
proliferation of the default_open() implementation across the entire
tree.

Now that the common implementation has been consolidated into libfs we
can replace all the users of this function with simple_open().

This replacement was done with the following semantic patch:


@ open @
identifier open_f != simple_open;
identifier i, f;
@@
-int open_f(struct inode *i, struct file *f)
-{
(
-if (i->i_private)
-f->private_data = i->i_private;
|
-f->private_data = i->i_private;
)
-return 0;
-}

@ has_open depends on open @
identifier fops;
identifier open.open_f;
@@
struct file_operations fops = {
...
-.open = open_f,
+.open = simple_open,
...
};


[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stephen Boyd 
Cc: Greg Kroah-Hartman 
Cc: Al Viro 
Cc: Julia Lawall 
Acked-by: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds