From: Rafael J. Wysocki Date: Fri, 10 Aug 2007 20:00:57 +0000 (-0700) Subject: Hibernation: do not try to mark invalid PFNs as nosave X-Git-Tag: MMI-PSA29.97-13-9~40821 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c5a69adff920ddf138c3ea9886574b195d9e3d52;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git Hibernation: do not try to mark invalid PFNs as nosave On some systems some PFNs reported by the early initialization code as 'nosave' may be invalid. If we try to set the corresponding bits in the hibernation bitmap, BUG_ON() in memory_bm_find_bit() will be triggered and the system won't be able to boot (cf. https://bugzilla.novell.com/show_bug.cgi?id=296242). Prevent this from happening by verifying if the 'nosave' PFNs are valid in mark_nosave_pages(). Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index a3b7854b8f7c..a686590d88c1 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -709,7 +709,8 @@ static void mark_nosave_pages(struct memory_bitmap *bm) region->end_pfn << PAGE_SHIFT); for (pfn = region->start_pfn; pfn < region->end_pfn; pfn++) - memory_bm_set_bit(bm, pfn); + if (pfn_valid(pfn)) + memory_bm_set_bit(bm, pfn); } }