sysfs: copy bin mmap support from fs/sysfs/bin.c to fs/sysfs/file.c
authorTejun Heo <tj@kernel.org>
Tue, 1 Oct 2013 21:42:07 +0000 (17:42 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 6 Oct 2013 00:27:40 +0000 (17:27 -0700)
commit73d9714627adced2942e8d53ce0e73d9699a996c
treebd144cf3a7871240386c70fae6c4492f3331c093
parent2f0c6b7593a590eef7fa35344da57380fcee7581
sysfs: copy bin mmap support from fs/sysfs/bin.c to fs/sysfs/file.c

sysfs bin file handling will be merged into the regular file support.
This patch copies mmap support from bin so that fs/sysfs/file.c can
handle mmapping bin files.

The code is copied mostly verbatim with the following updates.

* ->mmapped and ->vm_ops are added to sysfs_open_file and bin_buffer
  references are replaced with sysfs_open_file ones.

* Symbols are prefixed with sysfs_.

* sysfs_unmap_bin_file() grabs sysfs_open_dirent and traverses
  ->files.  Invocation of this function is added to
  sysfs_addrm_finish().

* sysfs_bin_mmap() is added to sysfs_bin_operations.

This is a preparation and the new mmap path isn't used yet.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/sysfs/dir.c
fs/sysfs/file.c
fs/sysfs/sysfs.h