get rid of s_files and files_lock
The only thing we need it for is alt-sysrq-r (emergency remount r/o)
and these days we can do just as well without going through the
list of files.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/super.c b/fs/super.c
index 743bb71..e5f6c2c 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -140,9 +140,6 @@
int i;
list_lru_destroy(&s->s_dentry_lru);
list_lru_destroy(&s->s_inode_lru);
-#ifdef CONFIG_SMP
- free_percpu(s->s_files);
-#endif
for (i = 0; i < SB_FREEZE_LEVELS; i++)
percpu_counter_destroy(&s->s_writers.counter[i]);
security_sb_free(s);
@@ -172,15 +169,6 @@
if (security_sb_alloc(s))
goto fail;
-#ifdef CONFIG_SMP
- s->s_files = alloc_percpu(struct list_head);
- if (!s->s_files)
- goto fail;
- for_each_possible_cpu(i)
- INIT_LIST_HEAD(per_cpu_ptr(s->s_files, i));
-#else
- INIT_LIST_HEAD(&s->s_files);
-#endif
for (i = 0; i < SB_FREEZE_LEVELS; i++) {
if (percpu_counter_init(&s->s_writers.counter[i], 0) < 0)
goto fail;
@@ -722,7 +710,8 @@
make sure there are no rw files opened */
if (remount_ro) {
if (force) {
- mark_files_ro(sb);
+ sb->s_readonly_remount = 1;
+ smp_wmb();
} else {
retval = sb_prepare_remount_readonly(sb);
if (retval)