staging: comedi: comedi_buf: factor out new buffer allocation code
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Wed, 9 Jan 2013 20:26:26 +0000 (13:26 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Jan 2013 00:53:58 +0000 (16:53 -0800)
commit6bd764573179f3f7c165b1ee093aff2d7ad3c59e
tree20760eb69560c6ed39338908ae2839bdcb71c720
parent718c4d68d9491e8bc16a614d193b257efc41723e
staging: comedi: comedi_buf: factor out new buffer allocation code

The function comedi_buf_alloc() first frees any allocated buffer then,
optionally, allocates a new buffer.

Factor out the new buffer allocation code to a new function. This
allows reducing the indent level and makes the code a bit cleaner.

Also, cleanup to factored out code to make it a bit more concise.
Use a local variable for the current comedi_buf_page being allocated.
This cleans up the ugly line breaks used to keep the lines < 80 chars.

Move the #ifdef'ery for the page protection determination out of the
vmap() call.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/comedi_buf.c