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Subject[PATCH RFC tip/core/rcu 20/23] kernel: __rcu annotations
Date
From: Arnd Bergmann <arnd@arndb.de>

This adds annotations for RCU operations in core kernel components

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/fdtable.h | 6 +++---
include/linux/fs.h | 2 +-
include/linux/genhd.h | 6 +++---
include/linux/init_task.h | 4 ++--
include/linux/iocontext.h | 2 +-
include/linux/mm_types.h | 2 +-
6 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 551671e..3e4c4f4 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -31,7 +31,7 @@ struct embedded_fd_set {

struct fdtable {
unsigned int max_fds;
- struct file ** fd; /* current fd array */
+ struct file __rcu **fd; /* current fd array */
fd_set *close_on_exec;
fd_set *open_fds;
struct rcu_head rcu;
@@ -46,7 +46,7 @@ struct files_struct {
* read mostly part
*/
atomic_t count;
- struct fdtable *fdt;
+ struct fdtable __rcu *fdt;
struct fdtable fdtab;
/*
* written part on a separate cache line in SMP
@@ -55,7 +55,7 @@ struct files_struct {
int next_fd;
struct embedded_fd_set close_on_exec_init;
struct embedded_fd_set open_fds_init;
- struct file * fd_array[NR_OPEN_DEFAULT];
+ struct file __rcu * fd_array[NR_OPEN_DEFAULT];
};

#define rcu_dereference_check_fdtable(files, fdtfd) \
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 44f35ae..752bc76 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1382,7 +1382,7 @@ struct super_block {
* Saved mount options for lazy filesystems using
* generic_show_options()
*/
- char *s_options;
+ char __rcu *s_options;
};

extern struct timespec current_fs_time(struct super_block *sb);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 5f2f4c4..af3f06b 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -129,8 +129,8 @@ struct blk_scsi_cmd_filter {
struct disk_part_tbl {
struct rcu_head rcu_head;
int len;
- struct hd_struct *last_lookup;
- struct hd_struct *part[];
+ struct hd_struct __rcu *last_lookup;
+ struct hd_struct __rcu *part[];
};

struct gendisk {
@@ -149,7 +149,7 @@ struct gendisk {
* non-critical accesses use RCU. Always access through
* helpers.
*/
- struct disk_part_tbl *part_tbl;
+ struct disk_part_tbl __rcu *part_tbl;
struct hd_struct part0;

const struct block_device_operations *fops;
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 7996fc2..f05af8c 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -137,8 +137,8 @@ extern struct cred init_cred;
.children = LIST_HEAD_INIT(tsk.children), \
.sibling = LIST_HEAD_INIT(tsk.sibling), \
.group_leader = &tsk, \
- .real_cred = &init_cred, \
- .cred = &init_cred, \
+ RCU_INIT_POINTER(.real_cred, &init_cred), \
+ RCU_INIT_POINTER(.cred, &init_cred), \
.cred_guard_mutex = \
__MUTEX_INITIALIZER(tsk.cred_guard_mutex), \
.comm = "swapper", \
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index a0bb301..6d4cd79 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -54,7 +54,7 @@ struct io_context {

struct radix_tree_root radix_root;
struct hlist_head cic_list;
- void *ioc_data;
+ void __rcu *ioc_data;
};

static inline struct io_context *ioc_task_link(struct io_context *ioc)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index b8bb9a6..05537a5 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -299,7 +299,7 @@ struct mm_struct {
* new_owner->mm == mm
* new_owner->alloc_lock is held
*/
- struct task_struct *owner;
+ struct task_struct __rcu *owner;
#endif

#ifdef CONFIG_PROC_FS
--
1.7.0.6


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