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authorEric Dumazet <dada1@cosmosbay.com>2005-10-30 15:02:16 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 17:37:19 -0800
commit2f51201662b28dbf8c15fb7eb972bc51c6cc3fa5 (patch)
tree96826df796058560bc5dd1f7d8d476c5a741d7bc /security
parent503af334ecf23b9d65d2ff0cc759f3a0bf338290 (diff)
downloadlinux-linaro-stable-2f51201662b28dbf8c15fb7eb972bc51c6cc3fa5.tar.gz
[PATCH] reduce sizeof(struct file)
Now that RCU applied on 'struct file' seems stable, we can place f_rcuhead in a memory location that is not anymore used at call_rcu(&f->f_rcuhead, file_free_rcu) time, to reduce the size of this critical kernel object. The trick I used is to move f_rcuhead and f_list in an union called f_u The callers are changed so that f_rcuhead becomes f_u.fu_rcuhead and f_list becomes f_u.f_list Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c2
-rw-r--r--security/selinux/selinuxfs.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index d50d7a782cf5..bb62838be496 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1609,7 +1609,7 @@ static inline void flush_unauthorized_files(struct files_struct * files)
if (tty) {
file_list_lock();
- file = list_entry(tty->tty_files.next, typeof(*file), f_list);
+ file = list_entry(tty->tty_files.next, typeof(*file), f_u.fu_list);
if (file) {
/* Revalidate access to controlling tty.
Use inode_has_perm on the tty inode directly rather
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 7a387fec2a0c..fdc382389720 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -914,7 +914,7 @@ static void sel_remove_bools(struct dentry *de)
file_list_lock();
list_for_each(p, &sb->s_files) {
- struct file * filp = list_entry(p, struct file, f_list);
+ struct file * filp = list_entry(p, struct file, f_u.fu_list);
struct dentry * dentry = filp->f_dentry;
if (dentry->d_parent != de) {