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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-10-04 11:06:42 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-11-09 00:16:20 -0500 |
| commit | eee5cc2702929fd41cce28058dc6d6717f723f87 (patch) | |
| tree | d405e2302511adec7d25024679b8ac2cbd95d608 /fs/super.c | |
| parent | 8b61e74ffc6310e1d35a9b51c8463093851f8bcf (diff) | |
| download | lwn-eee5cc2702929fd41cce28058dc6d6717f723f87.tar.gz lwn-eee5cc2702929fd41cce28058dc6d6717f723f87.zip | |
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>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/fs/super.c b/fs/super.c index 743bb7118053..e5f6c2cfac38 100644 --- a/fs/super.c +++ b/fs/super.c @@ -140,9 +140,6 @@ static void destroy_super(struct super_block *s) 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 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) 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 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force) 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) |