linux.git/fs/sysfs/file.c, branch v2.6.22

use simple_read_from_buffer() in fs/

2007-05-09T19:30:49+00:00

Cleanup using simple_read_from_buffer() in binfmt_misc, configfs, and sysfs.

Cc: Greg Kroah-Hartman 
Cc: Joel Becker 
Signed-off-by: Akinobu Mita 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

remove "struct subsystem" as it is no longer needed

2007-05-03T01:57:59+00:00

We need to work on cleaning up the relationship between kobjects, ksets and
ktypes.  The removal of 'struct subsystem' is the first step of this,
especially as it is not really needed at all.

Thanks to Kay for fixing the bugs in this patch.

Signed-off-by: Greg Kroah-Hartman

device_schedule_callback() needs a module reference

2007-04-27T17:57:32+00:00

This patch (as896b) fixes an oversight in the design of
device_schedule_callback().  It is necessary to acquire a reference to the
module owning the callback routine, to prevent the module from being
unloaded before the callback can run.

Signed-off-by: Alan Stern 
Cc: Satyam Sharma 
Cc: Neil Brown 
Cc: Cornelia Huck 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

[PATCH] sysfs: reinstate exclusion between method calls and attribute unregistration

2007-03-15T22:29:26+00:00

This patch (as869) reinstates the mutual exclusion between sysfs
attribute method calls and attribute unregistration.  The
previously-reported deadlocks have been fixed, and this exclusion is
by far the simplest way to avoid races during driver unbinding.

The check for orphaned read-buffers has been moved down slightly, so
that the remainder of a partially-read buffer will still be available
to userspace even after the attribute has been unregistered.

Signed-off-by: Alan Stern 
Cc: Hugh Dickins 
Cc: Cornelia Huck 
Cc: Oliver Neukum 
Signed-off-by: Linus Torvalds

[PATCH] sysfs and driver core: add callback helper, used by SCSI and S390

2007-03-15T22:29:26+00:00

This patch (as868) adds a helper routine for device drivers that need
to set up a callback to perform some action in a different process's
context.  This is intended for use by attribute methods that want to
unregister themselves or their parent device.  Attribute method calls
are mutually exclusive with unregistration, so such actions cannot be
taken directly.

Two attribute methods are converted to use the new helper routine: one
for SCSI device deletion and one for System/390 ccwgroup devices.

Signed-off-by: Alan Stern 
Cc: Hugh Dickins 
Cc: Cornelia Huck 
Cc: Oliver Neukum 
Signed-off-by: Linus Torvalds

sysfs: allow attributes to be added to groups

2007-02-23T23:03:46+00:00

This patch (as860) adds two new sysfs routines:
sysfs_add_file_to_group() and sysfs_remove_file_from_group().
A later patch adds code that uses the new routines.

Signed-off-by: Alan Stern 
Cc: Maneesh Soni 
Signed-off-by: Greg Kroah-Hartman

PCI/sysfs/kobject kernel-doc fixes

2007-02-16T23:30:10+00:00

Fix kernel-doc warnings in PCI, sysfs, and kobject files.

Signed-off-by: Randy Dunlap 
Signed-off-by: Greg Kroah-Hartman

sysfs: error handling in sysfs, fill_read_buffer()

2007-02-07T18:37:13+00:00

if a driver returns an error in fill_read_buffer(), the buffer will be
marked as filled. Subsequent reads will return eof. But there is
no data because of an error, not because it has been read.
Not marking the buffer filled is the obvious fix.

Signed-off-by: Oliver Neukum 
Signed-off-by: Greg Kroah-Hartman

sysfs: kobject_put cleanup

2007-02-07T18:37:13+00:00

This patch removes redundant argument checks for kobject_put().

Signed-off-by: Mariusz Kozlowski 
Signed-off-by: Greg Kroah-Hartman

Driver core: fix race in sysfs between sysfs_remove_file() and read()/write()

2007-02-07T18:37:13+00:00

This patch prevents a race between IO and removing a file from sysfs.
It introduces a list of sysfs_buffers associated with a file at the inode.
Upon removal of a file the list is walked and the buffers marked orphaned.
IO to orphaned buffers fails with -ENODEV. The driver can safely free
associated data structures or be unloaded.

Signed-off-by: Oliver Neukum 
Acked-by: Maneesh Soni 
Signed-off-by: Greg Kroah-Hartman