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percpu: add __percpu sparse annotations to fs

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Add __percpu sparse annotations to fs.

These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors.  This patch doesn't affect normal builds.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Alex Elder <aelder@sgi.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Tejun Heo 2010-02-02 14:39:01 +09:00
parent 43cf38eb5c
commit 003cb608a2
5 changed files with 6 additions and 6 deletions
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2
fs/ext4/ext4.h
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@ -1014,7 +1014,7 @@ struct ext4_sb_info {
atomic_t s_lock_busy;
/* locality groups */
struct ext4_locality_group *s_locality_groups;
struct ext4_locality_group __percpu *s_locality_groups;
/* for write statistics */
unsigned long s_sectors_written_start;

4
fs/nfs/iostat.h
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@ -57,12 +57,12 @@ static inline void nfs_add_fscache_stats(struct inode *inode,
}
#endif
static inline struct nfs_iostats *nfs_alloc_iostats(void)
static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
{
return alloc_percpu(struct nfs_iostats);
}
static inline void nfs_free_iostats(struct nfs_iostats *stats)
static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
{
if (stats != NULL)
free_percpu(stats);

2
fs/xfs/xfs_mount.h
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@ -243,7 +243,7 @@ typedef struct xfs_mount {
struct xfs_qmops *m_qm_ops; /* vector of XQM ops */
atomic_t m_active_trans; /* number trans frozen */
#ifdef HAVE_PERCPU_SB
xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */
xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
unsigned long m_icsb_counters; /* disabled per-cpu counters */
struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
struct mutex m_icsb_mutex; /* balancer sync lock */

2
include/linux/mount.h
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@ -66,7 +66,7 @@ struct vfsmount {
int mnt_pinned;
int mnt_ghosts;
#ifdef CONFIG_SMP
int *mnt_writers;
int __percpu *mnt_writers;
#else
int mnt_writers;
#endif

2
include/linux/nfs_fs_sb.h
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@ -105,7 +105,7 @@ struct nfs_server {
struct rpc_clnt * client; /* RPC client handle */
struct rpc_clnt * client_acl; /* ACL RPC client handle */
struct nlm_host *nlm_host; /* NLM client handle */
struct nfs_iostats * io_stats; /* I/O statistics */
struct nfs_iostats __percpu *io_stats; /* I/O statistics */
struct backing_dev_info backing_dev_info;
atomic_long_t writeback; /* number of writeback pages */
int flags; /* various flags */