From: Peter Watkins Date: Wed, 23 Aug 2006 15:15:49 +0000 (-0400) Subject: [MIPS] Fix USER_PTRS_PER_PGD for 64K page size. X-Git-Tag: v2.6.19-rc1~1023 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=9dbd7b9142e95867ee8a56da5d45c72884c107d3;p=linux-2.6-omap-h63xx.git [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 Signed-off-by: Ralf Baechle --- diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h index c59a1e21f5b..d05fb6f38aa 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 \