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fuse: use atomic64_t for khctr 

...to get rid of one more fc->lock use.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2019-01-24 10:40:17 +01:00
parent eb98e3bdf3
commit 75126f5504
3 changed files with 3 additions and 5 deletions
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4
fs/fuse/file.c
View File

@ -64,9 +64,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
RB_CLEAR_NODE(&ff->polled_node);
init_waitqueue_head(&ff->poll_wait);
spin_lock(&fc->lock);
ff->kh = ++fc->khctr;
spin_unlock(&fc->lock);
ff->kh = atomic64_inc_return(&fc->khctr);
return ff;
}

2
fs/fuse/fuse_i.h
View File

@ -544,7 +544,7 @@ struct fuse_conn {
struct fuse_iqueue iq;
/** The next unique kernel file handle */
u64 khctr;
atomic64_t khctr;
/** rbtree of fuse_files waiting for poll events indexed by ph */
struct rb_root polled_files;

2
fs/fuse/inode.c
View File

@ -622,7 +622,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns)
atomic_set(&fc->num_waiting, 0);
fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;
fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;
fc->khctr = 0;
atomic64_set(&fc->khctr, 0);
fc->polled_files = RB_ROOT;
fc->blocked = 0;
fc->initialized = 0;