percpu: add __percpu sparse annotations to fs
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>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 874d169..4cedc91 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1014,7 +1014,7 @@
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;
diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index 46d779a..1d8d5c8 100644
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -57,12 +57,12 @@
}
#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);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 1df7e45..24c8887 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -243,7 +243,7 @@
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 */