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authorHugh Dickins <hugh@veritas.com>2005-04-19 13:29:21 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org.(none)>2005-04-19 13:29:21 -0700
commit6119be0bba10e7e7b1e5650a87812fa2fd8d3a60 (patch)
tree5acc21e0611f1caf7163c120ca4214b2ee452b0d /include
parent8462e201756dd3bbe7e542106fc6fd6fe059cee2 (diff)
[PATCH] freepgt: arm FIRST_USER_ADDRESS PAGE_SIZE
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> 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-arm/pgtable.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index 91ffb1f4cd10..2df4eacf4fa9 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -102,6 +102,13 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
#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)