I tried to inspect "struct user_struct"->files , but it seems to me that
the value is always 0... This field is not used?
----------
>From e6f9007c5785d5c9817b8fb798542c44d1eefcc5 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Date: Mon, 14 Oct 2013 00:19:19 +0900
Subject: [PATCH] Remove unused "struct user_struct"->files.
Remove no longer used field.
Signed-off-by: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
---
include/linux/sched.h | 1 -
kernel/user.c | 1 -
2 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6682da3..baa18d5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -638,7 +638,6 @@ static inline int signal_group_exit(const struct
signal_struct *sig)
struct user_struct {
atomic_t __count; /* reference count */
atomic_t processes; /* How many processes does this user have? */
- atomic_t files; /* How many open files does this user have? */
atomic_t sigpending; /* How many pending signals does this user
have? */
#ifdef CONFIG_INOTIFY_USER
atomic_t inotify_watches; /* How many inotify watches does this user
have? */
diff --git a/kernel/user.c b/kernel/user.c
index 5bbb919..3024ab8 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -83,7 +83,6 @@ static DEFINE_SPINLOCK(uidhash_lock);
struct user_struct root_user = {
.__count = ATOMIC_INIT(1),
.processes = ATOMIC_INIT(1),
- .files = ATOMIC_INIT(0),
.sigpending = ATOMIC_INIT(0),
.locked_shm = 0,
.uid = GLOBAL_ROOT_UID,
--
1.7.1
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