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eventfd: convert to use anon_inode_getfd()

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Nothing actually calls eventfd_file_create() besides the eventfd2()
system call itself.  So simplify things by folding it into the system
call and using anon_inode_getfd() instead of anon_inode_getfile().  This
removes over 40 lines with no change in functionality.

(eventfd_file_create() 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:
Eric Biggers
2018-01-06 09:45:42 -08:00
committed by Al Viro
parent 6db620012f
commit 7d815165c1
2 changed files with 7 additions and 51 deletions
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5
include/linux/eventfd.h
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@@ -30,7 +30,6 @@ struct file;
#ifdef CONFIG_EVENTFD
struct file *eventfd_file_create(unsigned int count, int flags);
struct eventfd_ctx *eventfd_ctx_get(struct eventfd_ctx *ctx);
void eventfd_ctx_put(struct eventfd_ctx *ctx);
struct file *eventfd_fget(int fd);
@@ -47,10 +46,6 @@ int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_entry_t *w
* Ugly ugly ugly error layer to support modules that uses eventfd but
* pretend to work in !CONFIG_EVENTFD configurations. Namely, AIO.
*/
static inline struct file *eventfd_file_create(unsigned int count, int flags)
{
return ERR_PTR(-ENOSYS);
}
static inline struct eventfd_ctx *eventfd_ctx_fdget(int fd)
{