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-rw-r--r--include/linux/fs_struct.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index a97c053d3a9..18b467dbe27 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -4,7 +4,10 @@
#include <linux/path.h>
struct fs_struct {
- atomic_t count;
+ atomic_t count; /* This usage count is used by check_unsafe_exec() for
+ * security checking purposes - therefore it may not be
+ * incremented, except by clone(CLONE_FS).
+ */
rwlock_t lock;
int umask;
struct path root, pwd;