[PATCH 00/16 v4] pramfs: persistent and protected RAM filesystem

[Marco Stornelli <marco.stornelli@gmail.com>]

Hi all,

fourth round for the patch series. I summarize here the changes to
improve the review:

v4:
- in bitmap init used already present bitmap_set function
- fix a possible memory leak in an error path reported by yidong zhang

v3:
- fix a possible memory leak in an error path reported by yidong zhang
- fix a warning when using XIP about not used __pram_mmap symbol
- fix test module header description and replaced TEST_MODULE with
PRAMFS_TEST_MODULE in the Kconfig and Makefile according to the comments
done by Randy Dunlap
- fix a compilation warning in super.c reported by James Hogan
- fix a compilation error when XIP was enabled
- removed not used symbol PRAM_XATTR_INDEX_LUSTRE
- fix some comment style issue

v2:
- fix documentation errors reported by Randy Dunlap and Kieran Bingham
- reworked memory write protection functions with the suggestions of
Andi Kleen

v1:
- first draft

Andrew/Greg, can you insert the code in the mm/staging tree?

Marco