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mm: fix memory_hotplug.c printk format warning

PATCH New Randy Dunlap 1 participant 1 message Apr 18, 2013

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PATCH 1/1 mm: fix memory_hotplug.c printk format warning

From: Randy Dunlap <[email protected]>

PFN_PHYS() is a phys_addr_t, which can be u32 or u64. Fix the build warning when phys_addr_t is u32.

mm/memory_hotplug.c: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 2 has type 'unsigned int' [-Wformat]: => 1685:3 mm/memory_hotplug.c: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'unsigned int' [-Wformat]: => 1685:3

---
 mm/memory_hotplug.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

I guess this modern "%pa" is preferred over casting to (u64), but just casting seems a simpler fix to me. I.e.:

if (unlikely(ret))
pr_warn("removing memory fails, because memory "
"[%#010llx-%#010llx] is onlined\n",
- PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)),
- PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1))-1);
+ (u64)PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)),
+ (u64)PFN_PHYS(section_nr_to_pfn(
+ mem->end_section_nr + 1))-1);

return ret;
}

mm/memory_hotplug.c +8 -4
@@ -1681,11 +1681,15 @@ static int is_memblock_offlined_cb(struc
 {
 	int ret = !is_memblock_offlined(mem);
 
-	if (unlikely(ret))
+	if (unlikely(ret)) {
+		phys_addr_t beginpa, endpa;
+
+		beginpa = PFN_PHYS(section_nr_to_pfn(mem->start_section_nr));
+		endpa = PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1))-1;
 		pr_warn("removing memory fails, because memory "
-			"[%#010llx-%#010llx] is onlined\n",
-			PFN_PHYS(section_nr_to_pfn(mem->start_section_nr)),
-			PFN_PHYS(section_nr_to_pfn(mem->end_section_nr + 1))-1);
+			"[%pa-%pa] is onlined\n",
+			&beginpa, &endpa);
+	}
 
 	return ret;
 }

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