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[MIPS] Fix USER_PTRS_PER_PGD for 64K page size. 

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.

Signed-off-by: Peter Watkins <treestem@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Peter Watkins 2006-08-23 11:15:49 -04:00 committed by Ralf Baechle
parent 663c3d9009
commit 9dbd7b9142
1 changed files with 5 additions and 1 deletions
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6
include/asm-mips/pgtable-64.h
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@ -93,8 +93,12 @@
#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 \