Hi Mel,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git since-3.5
head:   a1e6f861ce9bd58373728fe2de149eaf766238ae
commit: c5e47c8e10f4f45effb589de310b124b4c8cd501 [192/198] mm-compaction-cache-if-a-pageblock-was-scanned-and-no-pages-were-isolated-fix
config: i386-randconfig-b083 (attached as .config)

All error/warnings:

mm/compaction.c: In function 'isolate_freepages_block':
mm/compaction.c:346:3: warning: passing argument 1 of 'update_pageblock_skip' from incompatible pointer type [enabled by default]
mm/compaction.c:137:13: note: expected 'struct page *' but argument is of type 'struct compact_control *'
mm/compaction.c:346:3: warning: passing argument 2 of 'update_pageblock_skip' makes integer from pointer without a cast [enabled by default]
mm/compaction.c:137:13: note: expected 'long unsigned int' but argument is of type 'struct page *'
mm/compaction.c:346:3: error: too many arguments to function 'update_pageblock_skip'
mm/compaction.c:137:13: note: declared here
mm/compaction.c: In function 'isolate_migratepages_range':
mm/compaction.c:639:3: warning: passing argument 1 of 'update_pageblock_skip' from incompatible pointer type [enabled by default]
mm/compaction.c:137:13: note: expected 'struct page *' but argument is of type 'struct compact_control *'
mm/compaction.c:639:3: warning: passing argument 2 of 'update_pageblock_skip' makes integer from pointer without a cast [enabled by default]
mm/compaction.c:137:13: note: expected 'long unsigned int' but argument is of type 'struct page *'
mm/compaction.c:639:3: error: too many arguments to function 'update_pageblock_skip'
mm/compaction.c:137:13: note: declared here
mm/compaction.c: At top level:
mm/compaction.c:206:13: warning: 'compact_capture_page' defined but not used [-Wunused-function]

vim +346 mm/compaction.c

2a797ce7 (Mel Gorman 2012-09-26  340) 
41ae238c (Mel Gorman 2012-09-25  341) 	if (locked)
41ae238c (Mel Gorman 2012-09-25  342) 		spin_unlock_irqrestore(&cc->zone->lock, flags);
41ae238c (Mel Gorman 2012-09-25  343) 
7faeb2a3 (Mel Gorman 2012-09-25  344) 	/* Update the pageblock-skip if the whole pageblock was scanned */
7faeb2a3 (Mel Gorman 2012-09-25  345) 	if (blockpfn == end_pfn)
84b28032 (Mel Gorman 2012-09-25 @346) 		update_pageblock_skip(cc, valid_page, total_isolated, false);
7faeb2a3 (Mel Gorman 2012-09-25  347) 
748446bb (Mel Gorman 2010-05-24  348) 	return total_isolated;
748446bb (Mel Gorman 2010-05-24  349) }

84b28032  mm: compaction: Restart compaction from near where it left off

---
0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu, Yuanhan Liu                              Intel Corporation