Hello,
There are a number of changes required to support larger page sizes, but
this one I thought worth sending up right away.
The code in pgtable-64.h assumes TASK_SIZE is always bigger than a first
level PGDIR_SIZE. This is not the case for 64K pages, where task size is
40 bits (1TB) and a pgd entry can map 42 bits. This leads to
USER_PTRS_PER_PGD being zero for 64K pages.
If there is interest in other changes for 64K pages, I can send more.
Signed-off-by: Peter Watkins <treestem@xxxxxxxxx>
diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h
index e3db932..9ce72bd 100644
--- a/include/asm-mips/pgtable-64.h
+++ b/include/asm-mips/pgtable-64.h
@@ -93,8 +93,12 @@ #define PTRS_PER_PGD ((PAGE_SIZE << PGD_
#define PTRS_PER_PMD ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
+#if PGDIR_SIZE >= TASK_SIZE
+#define USER_PTRS_PER_PGD (1)
+#else
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
-#define FIRST_USER_ADDRESS 0
+#endif
+#define FIRST_USER_ADDRESS 0UL
#define VMALLOC_START MAP_BASE
#define VMALLOC_END \
