mm: add comment on storage key dirty bit semantics
authorJan Kara <jack@suse.cz>
Wed, 12 Dec 2012 00:01:09 +0000 (16:01 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 12 Dec 2012 01:22:23 +0000 (17:22 -0800)
commite749eb95531ac8349df47f8d46ce2641dcb16589
treec78428ed9c92bf0e4915f6dfa6a21d4e58e14465
parent712cd386fdc983d318fecf302a2a9cb8e9de90c9
mm: add comment on storage key dirty bit semantics

Add comments that dirty bit in storage key gets set whenever page content
is changed.  Hopefully if someone will use this function, he'll have a
look at one of the two places where we comment on this.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/s390/include/asm/page.h
mm/rmap.c