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get rid of s_files and files_lock

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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>
This commit is contained in:
Al Viro 2013-10-04 11:06:42 -04:00
parent 8b61e74ffc
commit eee5cc2702
5 changed files with 2 additions and 156 deletions
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13
include/linux/fs.h
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@ -764,12 +764,7 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index)
#define FILE_MNT_WRITE_RELEASED 2
struct file {
/*
* fu_list becomes invalid after file_free is called and queued via
* fu_rcuhead for RCU freeing
*/
union {
struct list_head fu_list;
struct llist_node fu_llist;
struct rcu_head fu_rcuhead;
} f_u;
@ -783,9 +778,6 @@ struct file {
* Must not be taken from IRQ context.
*/
spinlock_t f_lock;
#ifdef CONFIG_SMP
int f_sb_list_cpu;
#endif
atomic_long_t f_count;
unsigned int f_flags;
fmode_t f_mode;
@ -1264,11 +1256,6 @@ struct super_block {
struct list_head s_inodes; /* all inodes */
struct hlist_bl_head s_anon; /* anonymous dentries for (nfs) exporting */
#ifdef CONFIG_SMP
struct list_head __percpu *s_files;
#else
struct list_head s_files;
#endif
struct list_head s_mounts; /* list of mounts; _not_ for fs use */
struct block_device *s_bdev;
struct backing_dev_info *s_bdi;