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-rw-r--r--include/linux/proc_fs.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 3469f96bc8b2..28e3664fdf1b 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -7,6 +7,8 @@
#include <linux/magic.h>
#include <asm/atomic.h>
+struct completion;
+
/*
* The proc filesystem constants/structures
*/
@@ -56,6 +58,14 @@ struct proc_dir_entry {
gid_t gid;
loff_t size;
const struct inode_operations *proc_iops;
+ /*
+ * NULL ->proc_fops means "PDE is going away RSN" or
+ * "PDE is just created". In either case, e.g. ->read_proc won't be
+ * called because it's too late or too early, respectively.
+ *
+ * If you're allocating ->proc_fops dynamically, save a pointer
+ * somewhere.
+ */
const struct file_operations *proc_fops;
get_info_t *get_info;
struct module *owner;
@@ -66,6 +76,9 @@ struct proc_dir_entry {
atomic_t count; /* use count */
int deleted; /* delete flag */
void *set;
+ int pde_users; /* number of callers into module in progress */
+ spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
+ struct completion *pde_unload_completion;
};
struct kcore_list {