linux-toradex.git/fs/debugfs, branch v2.6.27.42

debugfs: fix create mutex racy fops and private data

2009-12-18T21:30:41+00:00

commit d3a3b0adad0865c12e39b712ca89efbd0a3a0dbc upstream.

Setting fops and private data outside of the mutex at debugfs file
creation introduces a race where the files can be opened with the wrong
file operations and private data.  It is easy to trigger with a process
waiting on file creation notification.

Signed-off-by: Mathieu Desnoyers 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

debugfs: Implement debugfs_remove_recursive()

2008-07-22T04:54:59+00:00

debugfs_remove_recursive() will remove a dentry and all its children.
Drivers can use this to zap their whole debugfs tree so that they don't
need to keep track of every single debugfs dentry they created.

It may fail to remove the whole tree in certain cases:

sh-3.2# rmmod atmel-mci < /sys/kernel/debug/mmc0/ios/clock
mmc0: card b368 removed
atmel_mci atmel_mci.0: Lost dma0chan1, falling back to PIO
sh-3.2# ls /sys/kernel/debug/mmc0/
ios

But I'm not sure if that case can be handled in any sane manner.

Signed-off-by: Haavard Skinnemoen 
Cc: Pierre Ossman 
Signed-off-by: Greg Kroah-Hartman

DEBUGFS: Correct location of debugfs API documentation.

2008-04-30T23:52:47+00:00

Signed-off-by: Robert P. J. Day 
Signed-off-by: Greg Kroah-Hartman

debugfs: fix sparse warnings

2008-03-04T22:47:06+00:00

extern does not belong in C files, move declaration to linux/debugfs.h
fs/debugfs/file.c:42:30: warning: symbol 'debugfs_file_operations' was not declared. Should it be static?
fs/debugfs/file.c:54:31: warning: symbol 'debugfs_link_operations' was not declared. Should it be static?

Signed-off-by: Harvey Harrison 
Signed-off-by: Greg Kroah-Hartman

libfs: allow error return from simple attributes

2008-02-08T17:22:34+00:00

Sometimes simple attributes might need to return an error, e.g. for
acquiring a mutex interruptibly.  In fact we have that situation in
spufs already which is the original user of the simple attributes.  This
patch merged the temporarily forked attributes in spufs back into the
main ones and allows to return errors.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Christoph Hellwig 
Cc: 
Cc: Arnd Bergmann 
Cc: Greg KH 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Kobject: convert fs/* from kobject_unregister() to kobject_put()

2008-01-25T04:40:40+00:00

There is no need for kobject_unregister() anymore, thanks to Kay's
kobject cleanup changes, so replace all instances of it with
kobject_put().


Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

kobject: convert kernel_kset to be a kobject

2008-01-25T04:40:24+00:00

kernel_kset does not need to be a kset, but a much simpler kobject now
that we have kobj_attributes.

We also rename kernel_kset to kernel_kobj to catch all users of this
symbol with a build error instead of an easy-to-ignore build warning.

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

kset: convert kernel_subsys to use kset_create

2008-01-25T04:40:14+00:00

Dynamically create the kset instead of declaring it statically.  We also
rename kernel_subsys to kernel_kset to catch all users of this symbol
with a build error instead of an easy-to-ignore build warning.

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

kobject: convert debugfs to use kobject_create

2008-01-25T04:40:11+00:00

We don't need a kset here, a simple kobject will do just fine, so
dynamically create the kobject and use it.

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

kobject: remove struct kobj_type from struct kset

2008-01-25T04:40:10+00:00

We don't need a "default" ktype for a kset.  We should set this
explicitly every time for each kset.  This change is needed so that we
can make ksets dynamic, and cleans up one of the odd, undocumented
assumption that the kset/kobject/ktype model has.

This patch is based on a lot of help from Kay Sievers.

Nasty bug in the block code was found by Dave Young


Cc: Kay Sievers 
Cc: Dave Young 
Signed-off-by: Greg Kroah-Hartman