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@@ -7,9 +7,80 @@
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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+#include "internal.h"
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int __meminitdata mminit_loglevel;
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+void __init mminit_verify_pageflags_layout(void)
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+{
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+ int shift, width;
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+ unsigned long or_mask, add_mask;
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+
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+ shift = 8 * sizeof(unsigned long);
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+ width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH;
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths",
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+ "Section %d Node %d Zone %d Flags %d\n",
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+ SECTIONS_WIDTH,
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+ NODES_WIDTH,
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+ ZONES_WIDTH,
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+ NR_PAGEFLAGS);
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts",
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+ "Section %d Node %d Zone %d\n",
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+#ifdef SECTIONS_SHIFT
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+ SECTIONS_SHIFT,
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+#else
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+ 0,
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+#endif
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+ NODES_SHIFT,
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+ ZONES_SHIFT);
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_offsets",
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+ "Section %lu Node %lu Zone %lu\n",
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+ (unsigned long)SECTIONS_PGSHIFT,
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+ (unsigned long)NODES_PGSHIFT,
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+ (unsigned long)ZONES_PGSHIFT);
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_zoneid",
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+ "Zone ID: %lu -> %lu\n",
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+ (unsigned long)ZONEID_PGOFF,
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+ (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT));
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_usage",
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+ "location: %d -> %d unused %d -> %d flags %d -> %d\n",
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+ shift, width, width, NR_PAGEFLAGS, NR_PAGEFLAGS, 0);
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+#ifdef NODE_NOT_IN_PAGE_FLAGS
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+ mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags",
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+ "Node not in page flags");
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+#endif
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+
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+ if (SECTIONS_WIDTH) {
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+ shift -= SECTIONS_WIDTH;
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+ BUG_ON(shift != SECTIONS_PGSHIFT);
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+ }
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+ if (NODES_WIDTH) {
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+ shift -= NODES_WIDTH;
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+ BUG_ON(shift != NODES_PGSHIFT);
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+ }
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+ if (ZONES_WIDTH) {
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+ shift -= ZONES_WIDTH;
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+ BUG_ON(shift != ZONES_PGSHIFT);
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+ }
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+
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+ /* Check for bitmask overlaps */
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+ or_mask = (ZONES_MASK << ZONES_PGSHIFT) |
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+ (NODES_MASK << NODES_PGSHIFT) |
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+ (SECTIONS_MASK << SECTIONS_PGSHIFT);
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+ add_mask = (ZONES_MASK << ZONES_PGSHIFT) +
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+ (NODES_MASK << NODES_PGSHIFT) +
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+ (SECTIONS_MASK << SECTIONS_PGSHIFT);
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+ BUG_ON(or_mask != add_mask);
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+}
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+
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+void __meminit mminit_verify_page_links(struct page *page, enum zone_type zone,
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+ unsigned long nid, unsigned long pfn)
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+{
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+ BUG_ON(page_to_nid(page) != nid);
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+ BUG_ON(page_zonenum(page) != zone);
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+ BUG_ON(page_to_pfn(page) != pfn);
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+}
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+
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static __init int set_mminit_loglevel(char *str)
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{
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get_option(&str, &mminit_loglevel);
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