diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-04-30 00:54:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:49 -0700 |
| commit | cf0ca9fe5dd9e3693d935757a7b2fc50fc576554 (patch) | |
| tree | c795c5271eda9fc67579fa3176c646b892dfdb41 /lib | |
| parent | caafa4324335aeb11bc233d5f87aca8cce30beba (diff) | |
| download | lwn-cf0ca9fe5dd9e3693d935757a7b2fc50fc576554.tar.gz lwn-cf0ca9fe5dd9e3693d935757a7b2fc50fc576554.zip | |
mm: bdi: export BDI attributes in sysfs
Provide a place in sysfs (/sys/class/bdi) for the backing_dev_info object.
This allows us to see and set the various BDI specific variables.
In particular this properly exposes the read-ahead window for all relevant
users and /sys/block/<block>/queue/read_ahead_kb should be deprecated.
With patient help from Kay Sievers and Greg KH
[mszeredi@suse.cz]
- split off NFS and FUSE changes into separate patches
- document new sysfs attributes under Documentation/ABI
- do bdi_class_init as a core_initcall, otherwise the "default" BDI
won't be initialized
- remove bdi_init_fmt macro, it's not used very much
[akpm@linux-foundation.org: fix ia64 warning]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Greg KH <greg@kroah.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/percpu_counter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 393a0e915c23..119174494cb5 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -102,6 +102,7 @@ void percpu_counter_destroy(struct percpu_counter *fbc) return; free_percpu(fbc->counters); + fbc->counters = NULL; #ifdef CONFIG_HOTPLUG_CPU mutex_lock(&percpu_counters_lock); list_del(&fbc->list); |