commit 6119be0bba10e7e7b1e5650a87812fa2fd8d3a60
author Hugh Dickins <hugh@veritas.com> Tue Apr 19 13:29:21 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org.(none)> Tue Apr 19 13:29:21 2005 -0700
tree 5acc21e0611f1caf7163c120ca4214b2ee452b0d
parent 8462e201756dd3bbe7e542106fc6fd6fe059cee2

[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>

arch/arm/kernel/sys_arm.c

diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index c41dc60..7ba6342c 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -51,13 +51,6 @@
 	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 @@
 
 	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 @@
 {
 	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(&current->mm->mmap_sem);