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authorRafael J. Wysocki <rjw@sisk.pl>2007-08-10 13:00:57 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-11 15:47:40 -0700
commitc5a69adff920ddf138c3ea9886574b195d9e3d52 (patch)
tree446b3776c9f4ba3df5c22880adfc3395400fa220 /kernel/power
parenta75de1b3799f8933d6d2b64bdf31194368ec98ab (diff)
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 <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/snapshot.c3
1 files changed, 2 insertions, 1 deletions
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);
}
}