The 32-bit MIPS PGD_ORDER() macro expects __PGD_ORDER to be signed,

which it isn't now since the internal machdep->pagesize is unsigned.
Without this patch, module loading fails during initialization on a
kernel that has a page size of 16KB, with messages that indicate
"please wait... (gathering module symbol data)" followed by
"crash: invalid size request: 0  type: pgd page".
(rabinv@axis.com)

mips.c

@@ -28,7 +28,7 @@ typedef ulong pte_t;
 #define PGD_T_LOG2	(__builtin_ffs(sizeof(pgd_t)) - 1)
 #define PTE_T_LOG2	(__builtin_ffs(sizeof(pte_t)) - 1)
 
-#define __PGD_ORDER	(32 - 3 * PAGESHIFT() + PGD_T_LOG2 + PTE_T_LOG2)
+#define __PGD_ORDER	(32 - 3 * (int)PAGESHIFT() + PGD_T_LOG2 + PTE_T_LOG2)
 #define PGD_ORDER	(__PGD_ORDER >= 0 ? __PGD_ORDER : 0)
 #define PGD_SIZE	(PAGESIZE() << PGD_ORDER)