eventfd_ctx_fileget(9) centos man page | unix.com

EVENTFD_CTX_FILEGET(9)					  Events based on file descripto				    EVENTFD_CTX_FILEGET(9)

NAME
       eventfd_ctx_fileget - Acquires a reference to the internal eventfd context.

SYNOPSIS
       struct eventfd_ctx * eventfd_ctx_fileget(struct file * file);

ARGUMENTS
       file
	   [in] Eventfd file pointer.

DESCRIPTION
       Returns a pointer to the internal eventfd context, otherwise the error

POINTER
       -EINVAL : The fd file descriptor is not an eventfd file.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    EVENTFD_CTX_FILEGET(9)