diff options
| author |   Hugh Dickins <hugh@veritas.com> | 2005-04-19 13:29:22 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org.(none)> | 2005-04-19 13:29:22 -0700 |
| commit | cdfb82fff33cf3b1a367a427e5d89a012dc568b1 (patch) | |
| tree | e06fe6c70972feac1c0ba1f6451c9b3d825c84c9 /include | |
| parent | [PATCH] freepgt: arm FIRST_USER_ADDRESS PAGE_SIZE (diff) | |
| download | linux-dev-cdfb82fff33cf3b1a367a427e5d89a012dc568b1.tar.xz linux-dev-cdfb82fff33cf3b1a367a427e5d89a012dc568b1.zip | |
[PATCH] freepgt: arm26 FIRST_USER_ADDRESS PAGE_SIZE
ARM26 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. Previously, ARM26 permitted user mappings at 0 if the machine
vectors were mapped high; but that's inconsistent with ARM, and
FIRST_USER_ADDRESS would then have to be determined at runtime. Let's fix it
at PAGE_SIZE throughout the architecture.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-arm26/pgtable.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-arm26/pgtable.h b/include/asm-arm26/pgtable.h index af0b8907dc14..4a0a00da425f 100644 --- a/include/asm-arm26/pgtable.h +++ b/include/asm-arm26/pgtable.h @@ -62,6 +62,13 @@ #define PTRS_PER_PMD 1 #define PTRS_PER_PTE 32 +/* + * 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/PGD_SIZE) - FIRST_USER_PGD_NR) |