linux-toradex.git/fs/sysfs, branch v2.6.17.8

[PATCH] sysfs: Allow sysfs attribute files to be pollable

2006-04-14T18:41:24+00:00

It works like this:
  Open the file
  Read all the contents.
  Call poll requesting POLLERR or POLLPRI (so select/exceptfds works)
  When poll returns,
     close the file and go to top of loop.
   or lseek to start of file and go back to the 'read'.

Events are signaled by an object manager calling
   sysfs_notify(kobj, dir, attr);

If the dir is non-NULL, it is used to find a subdirectory which
contains the attribute (presumably created by sysfs_create_group).

This has a cost of one int  per attribute, one wait_queuehead per kobject,
one int per open file.

The name "sysfs_notify" may be confused with the inotify
functionality.  Maybe it would be nice to support inotify for sysfs
attributes as well?

This patch also uses sysfs_notify to allow /sys/block/md*/md/sync_action
to be pollable

Signed-off-by: Neil Brown 
Signed-off-by: Greg Kroah-Hartman

[PATCH] sysfs: zero terminate sysfs write buffers

2006-04-02T20:03:31+00:00

No one should be writing a PAGE_SIZE worth of data to a normal sysfs
file, so properly terminate the buffer.

Thanks to Al Viro for pointing out my supidity here.

Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Linus Torvalds

Documentation: fix minor kernel-doc warnings

2006-04-02T11:59:55+00:00

This patch updates the comments to match the actual code.

Signed-off-by: Martin Waitz 
Signed-off-by: Adrian Bunk

BUG_ON() Conversion in fs/sysfs/

2006-03-31T23:18:38+00:00

this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.

Signed-off-by: Eric Sesterhenn 
Signed-off-by: Adrian Bunk

[PATCH] Make most file operations structs in fs/ const

2006-03-28T17:16:06+00:00

This is a conversion to make the various file_operations structs in fs/
const.  Basically a regexp job, with a few manual fixups

The goal is both to increase correctness (harder to accidentally write to
shared datastructures) and reducing the false sharing of cachelines with
things that get dirty in .data (while .rodata is nicely read only and thus
cache clean)

Signed-off-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] sysfs: fix a kobject leak in sysfs_add_link on the error path

2006-03-20T21:42:59+00:00

As pointed out by Oliver Neukum.

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

[PATCH] sysfs: don't export dir symbols

2006-03-20T21:42:59+00:00

These functions should only be used by the kobject core, and if any
driver tries to use them, bad things happen.  Unexport them to try to
prevent this from happening.

Signed-off-by: Greg Kroah-Hartman

[PATCH] sysfs: fix problem with duplicate sysfs directories and files

2006-03-20T21:42:59+00:00

The following patch checks for existing sysfs_dirent before
preparing new one while creating sysfs directories and files.

Signed-off-by: Maneesh Soni 
Signed-off-by: Greg Kroah-Hartman

[PATCH] sysfs: kzalloc conversion

2006-03-20T21:42:58+00:00

this converts fs/sysfs to kzalloc() usage.
compile tested with make allyesconfig

Signed-off-by: Eric Sesterhenn 
Signed-off-by: Greg Kroah-Hartman

[PATCH] sysfs: sysfs_remove_dir() needs to invalidate the dentry

2006-03-20T21:42:57+00:00

When calling sysfs_remove_dir() don't allow any further sysfs functions
to work for this kobject anymore.  This fixes a nasty USB cdc-acm oops
on disconnect.

Many thanks to Bob Copeland and Paul Fulghum for taking the time to
track this down.

Cc: Bob Copeland 
Cc: Paul Fulghum 
Cc: Maneesh Soni 
Signed-off-by: Greg Kroah-Hartman