Messages in this thread Patch in this message | | | Date | Thu, 7 Apr 2005 02:14:37 +0100 (BST) | From | Hugh Dickins <> | Subject | [PATCH 3/6] freepgt2: arm FIRST_USER_ADDRESS PAGE_SIZE |
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ARM define FIRST_USER_ADDRESS as PAGE_SIZE (beyond the machine vectors when they are mapped low), and use that definition in place of locally defined MIN_MAP_ADDR.
Signed-off-by: Hugh Dickins <hugh@veritas.com> ---
arch/arm/kernel/sys_arm.c | 11 ++--------- include/asm-arm/pgtable.h | 7 +++++++ 2 files changed, 9 insertions(+), 9 deletions(-)
--- 2.6.12-rc2-mm1/arch/arm/kernel/sys_arm.c 2005-04-05 15:20:23.000000000 +0100 +++ linux/arch/arm/kernel/sys_arm.c 2005-04-05 18:59:00.000000000 +0100 @@ -51,13 +51,6 @@ asmlinkage int sys_pipe(unsigned long __ return error; } -/* - * This is the lowest virtual address we can permit any user space - * mapping to be mapped at. This is particularly important for - * non-high vector CPUs. - */ -#define MIN_MAP_ADDR (PAGE_SIZE) - /* common code for old and new mmaps */ inline long do_mmap2( unsigned long addr, unsigned long len, @@ -69,7 +62,7 @@ inline long do_mmap2( flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - if (flags & MAP_FIXED && addr < MIN_MAP_ADDR) + if (flags & MAP_FIXED && addr < FIRST_USER_ADDRESS) goto out; error = -EBADF; @@ -122,7 +115,7 @@ sys_arm_mremap(unsigned long addr, unsig { unsigned long ret = -EINVAL; - if (flags & MREMAP_FIXED && new_addr < MIN_MAP_ADDR) + if (flags & MREMAP_FIXED && new_addr < FIRST_USER_ADDRESS) goto out; down_write(¤t->mm->mmap_sem); --- 2.6.12-rc2-mm1/include/asm-arm/pgtable.h 2005-04-05 15:20:55.000000000 +0100 +++ linux/include/asm-arm/pgtable.h 2005-04-05 18:59:00.000000000 +0100 @@ -102,6 +102,13 @@ extern void __pgd_error(const char *file #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) +/* + * This is the lowest virtual address we can permit any user space + * mapping to be mapped at. This is particularly important for + * non-high vector CPUs. + */ +#define FIRST_USER_ADDRESS PAGE_SIZE + #define FIRST_USER_PGD_NR 1 #define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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