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NeilBrown 4508a7a734 [PATCH] sysfs: Allow sysfs attribute files to be pollable 
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 <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-04-14 11:41:24 -07:00
..
reed_solomon [PATCH] sem2mutex: kernel/ 2006-03-23 07:38:10 -08:00
zlib_deflate [PATCH] lib/zlib*: cleanups 2006-01-10 08:01:57 -08:00
zlib_inflate [PATCH] lib/zlib*: cleanups 2006-01-10 08:01:57 -08:00
.gitignore Add some basic .gitignore files 2005-10-18 08:26:15 -07:00
bitmap.c [PATCH] bitops: hweight() related cleanup 2006-03-26 08:57:15 -08:00
bust_spinlocks.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cmdline.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpumask.c [PATCH] cpumask: uninline any_online_cpu() 2006-03-25 08:23:00 -08:00
crc-ccitt.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
crc16.c [PATCH] lib/crc16: added crc16 algorithm. 2005-09-08 14:41:27 -07:00
crc32.c [PATCH] crc32.c typo fix 2005-08-07 10:00:40 -07:00
crc32defs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ctype.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dec_and_lock.c [PATCH] atomic: dec_and_lock use atomic primitives 2006-01-08 20:13:48 -08:00
div64.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dump_stack.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
errno.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
extable.c [PATCH] powerpc: trivial: modify comments to refer to new location of files 2006-02-10 16:53:51 +11:00
find_next_bit.c [PATCH] bitops: generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit() 2006-03-26 08:57:11 -08:00
gen_crc32table.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
genalloc.c [PATCH] fix broken lib/genalloc.c 2005-11-28 14:42:23 -08:00
halfmd4.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hweight.c [PATCH] bitops: hweight() speedup 2006-03-26 08:59:30 -08:00
idr.c [PATCH] Whitespace and CodingStyle cleanup for lib/idr.c 2005-10-30 17:37:19 -08:00
inflate.c [PATCH] Update in-kernel zlib routines 2005-08-05 16:23:21 -07:00
int_sqrt.c [PATCH] lib: Fix bug in int_sqrt() for 64 bit longs 2006-02-03 08:32:08 -08:00
iomap.c [PATCH] add Big Endian variants of ioread/iowrite 2005-04-16 15:25:54 -07:00
iomap_copy.c [PATCH] iomap_copy fallout (m68k) 2006-02-18 16:30:40 -05:00
Kconfig [PATCH] lib/crc16: added crc16 algorithm. 2005-09-08 14:41:27 -07:00
Kconfig.debug [PARISC] Remove obsolete CONFIG_DEBUG_IOREMAP 2006-03-30 17:48:50 +00:00
kernel_lock.c [PATCH] spinlock consolidation 2005-09-10 10:06:21 -07:00
klist.c [PATCH] klist: Fix broken kref counting in find functions 2006-01-04 16:18:08 -08:00
kobject.c [PATCH] sysfs: Allow sysfs attribute files to be pollable 2006-04-14 11:41:24 -07:00
kobject_uevent.c [PATCH] kobject: fix build error if CONFIG_SYSFS=n 2006-03-20 13:42:57 -08:00
kref.c [PATCH] kref: avoid an atomic operation in kref_put() 2006-03-20 13:42:57 -08:00
libcrc32c.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile [PATCH] bitops: generic hweight{64,32,16,8}() 2006-03-26 08:57:11 -08:00
parser.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
radix-tree.c [PATCH] radix-tree documentation cleanups 2006-03-25 08:22:59 -08:00
rbtree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rwsem-spinlock.c [PATCH] use smp_mb/wmb/rmb where possible 2005-05-01 08:58:47 -07:00
rwsem.c [PATCH] use smp_mb/wmb/rmb where possible 2005-05-01 08:58:47 -07:00
semaphore-sleepers.c [PATCH] unify x86/x86-64 semaphore code 2005-09-05 00:06:14 -07:00
sha1.c [PATCH] lib/sha1.c: fix sparse warning 2005-06-25 16:25:02 -07:00
smp_processor_id.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
sort.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
spinlock_debug.c [PATCH] Fix spinlock debugging delays to not time out too early 2006-02-07 16:12:33 -08:00
string.c [PATCH] Silence a const vs non-const warning 2006-04-11 06:18:42 -07:00
swiotlb.c BUG_ON() Conversion in lib/swiotlb.c 2006-03-24 18:47:11 +01:00
textsearch.c [PATCH] gfp_t: lib/* 2005-10-28 08:16:47 -07:00
ts_bm.c [TEXTSEARCH]: Fix broken good shift array calculation in Boyer-Moore 2006-02-02 17:15:41 -08:00
ts_fsm.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
ts_kmp.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
vsprintf.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00