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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-03-08 20:21:04 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-03-08 20:21:04 +0000
commit988addf82e4c03739375279de73929580a2d4a6a (patch)
tree989ae1cd4e264bbad80c65f04480486246e7b9f3 /include/linux/fdtable.h
parent004c1c7096659d352b83047a7593e91d8a30e3c5 (diff)
parent25cf84cf377c0aae5dbcf937ea89bc7893db5176 (diff)
Merge branch 'origin' into devel-stable
Conflicts: arch/arm/mach-mx2/devices.c arch/arm/mach-mx2/devices.h sound/soc/pxa/pxa-ssp.c
Diffstat (limited to 'include/linux/fdtable.h')
-rw-r--r--include/linux/fdtable.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index a2ec74bc481..013dc529e95 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -57,7 +57,14 @@ struct files_struct {
struct file * fd_array[NR_OPEN_DEFAULT];
};
-#define files_fdtable(files) (rcu_dereference((files)->fdt))
+#define rcu_dereference_check_fdtable(files, fdtfd) \
+ (rcu_dereference_check((fdtfd), \
+ rcu_read_lock_held() || \
+ lockdep_is_held(&(files)->file_lock) || \
+ atomic_read(&(files)->count) == 1))
+
+#define files_fdtable(files) \
+ (rcu_dereference_check_fdtable((files), (files)->fdt))
struct file_operations;
struct vfsmount;
@@ -78,7 +85,7 @@ static inline struct file * fcheck_files(struct files_struct *files, unsigned in
struct fdtable *fdt = files_fdtable(files);
if (fd < fdt->max_fds)
- file = rcu_dereference(fdt->fd[fd]);
+ file = rcu_dereference_check_fdtable(files, fdt->fd[fd]);
return file;
}