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authorPeter Watkins <treestem@gmail.com>2006-08-23 19:15:49 +0400
committerRalf Baechle <ralf@linux-mips.org>2006-09-27 16:37:52 +0400
commit9dbd7b9142e95867ee8a56da5d45c72884c107d3 (patch)
treea21e246155a5d4e779f161ea7595ada9b1f43a51 /include/asm-mips
parent663c3d9009c1a41194b8390abdcea61e3ade1c8f (diff)
downloadlinux-9dbd7b9142e95867ee8a56da5d45c72884c107d3.tar.xz
[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>
Diffstat (limited to 'include/asm-mips')
-rw-r--r--include/asm-mips/pgtable-64.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h
index c59a1e21f5b0..d05fb6f38aa7 100644
--- a/include/asm-mips/pgtable-64.h
+++ b/include/asm-mips/pgtable-64.h
@@ -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 \