eventfd: fold eventfd_ctx_get() into eventfd_ctx_fileget()
eventfd_ctx_get() is not used outside of eventfd.c, so unexport it and fold it into eventfd_ctx_fileget(). (eventfd_ctx_get() was apparently added years ago for KVM irqfd's, but was never used.) Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
b6364572d6
commit
105f2b7096
21
fs/eventfd.c
21
fs/eventfd.c
|
@ -79,25 +79,12 @@ static void eventfd_free(struct kref *kref)
|
|||
eventfd_free_ctx(ctx);
|
||||
}
|
||||
|
||||
/**
|
||||
* eventfd_ctx_get - Acquires a reference to the internal eventfd context.
|
||||
* @ctx: [in] Pointer to the eventfd context.
|
||||
*
|
||||
* Returns: In case of success, returns a pointer to the eventfd context.
|
||||
*/
|
||||
struct eventfd_ctx *eventfd_ctx_get(struct eventfd_ctx *ctx)
|
||||
{
|
||||
kref_get(&ctx->kref);
|
||||
return ctx;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(eventfd_ctx_get);
|
||||
|
||||
/**
|
||||
* eventfd_ctx_put - Releases a reference to the internal eventfd context.
|
||||
* @ctx: [in] Pointer to eventfd context.
|
||||
*
|
||||
* The eventfd context reference must have been previously acquired either
|
||||
* with eventfd_ctx_get() or eventfd_ctx_fdget().
|
||||
* with eventfd_ctx_fdget() or eventfd_ctx_fileget().
|
||||
*/
|
||||
void eventfd_ctx_put(struct eventfd_ctx *ctx)
|
||||
{
|
||||
|
@ -382,10 +369,14 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_fdget);
|
|||
*/
|
||||
struct eventfd_ctx *eventfd_ctx_fileget(struct file *file)
|
||||
{
|
||||
struct eventfd_ctx *ctx;
|
||||
|
||||
if (file->f_op != &eventfd_fops)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
return eventfd_ctx_get(file->private_data);
|
||||
ctx = file->private_data;
|
||||
kref_get(&ctx->kref);
|
||||
return ctx;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(eventfd_ctx_fileget);
|
||||
|
||||
|
|
|
@ -26,11 +26,11 @@
|
|||
#define EFD_SHARED_FCNTL_FLAGS (O_CLOEXEC | O_NONBLOCK)
|
||||
#define EFD_FLAGS_SET (EFD_SHARED_FCNTL_FLAGS | EFD_SEMAPHORE)
|
||||
|
||||
struct eventfd_ctx;
|
||||
struct file;
|
||||
|
||||
#ifdef CONFIG_EVENTFD
|
||||
|
||||
struct eventfd_ctx *eventfd_ctx_get(struct eventfd_ctx *ctx);
|
||||
void eventfd_ctx_put(struct eventfd_ctx *ctx);
|
||||
struct file *eventfd_fget(int fd);
|
||||
struct eventfd_ctx *eventfd_ctx_fdget(int fd);
|
||||
|
|
Loading…
Reference in New Issue