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 */
diff --git a/include/linux/mount.h b/include/linux/mount.h index 5d52753..b5f43a3 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h
@@ -66,7 +66,7 @@ int mnt_pinned; int mnt_ghosts; #ifdef CONFIG_SMP - int *mnt_writers; + int __percpu *mnt_writers; #else int mnt_writers; #endif
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 34fc6be..6a2e44f 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h
@@ -105,7 +105,7 @@ 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 */