Dan Williams 2424b5dd06 sysfs: refill attribute buffer when reading from offset 0 ... Requiring userspace to close and re-open sysfs attributes has been the policy since before 2.6.12. It allows userspace to get a consistent snapshot of kernel state and consume it with incremental reads and seeks. Now, if the file position is zero the kernel assumes userspace wants to see the new value. The application for this change is to allow a userspace RAID metadata handler to check the state of an array without causing any memory allocations. Thus not causing writeback to a raid array that might be blocked waiting for userspace to take action. Cc: Neil Brown <neilb@suse.de> Acked-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2008-04-19 19:10:29 -07:00
..
bin.c	sysfs: add copyrights	2007-10-12 14:51:12 -07:00
dir.c	SYSFS: Explicitly include required header file slab.h.	2008-04-19 19:10:27 -07:00
file.c	sysfs: refill attribute buffer when reading from offset 0	2008-04-19 19:10:29 -07:00
group.c	sysfs: remove BUG_ON() from sysfs_remove_group()	2008-02-07 11:31:46 -08:00
inode.c	mm: bdi init hooks	2007-10-17 08:42:45 -07:00
Makefile
mount.c	mm: bdi init hooks	2007-10-17 08:42:45 -07:00
symlink.c	sysfs: Allow removal of symlinks in the sysfs root	2008-04-18 08:56:10 -07:00
sysfs.h	sysfs: make sysfs_{get,put}_active() static	2007-10-30 21:52:33 -07:00