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authorJeremy Fitzhardinge <jeremy@xensource.com>2006-09-26 02:32:25 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:48:55 -0400
commit052e79941a042e5be4feffa03b1fd60d93fb9e9a (patch)
treefd3ac24a05029b50a6c6ddfa486ea441b4091806 /include/asm-i386
parent9f093394d75cd9c5df82c7a99c5eb5d7ce7ba199 (diff)
[PATCH] x86: make __FIXADDR_TOP variable to allow it to make space for a hypervisor
Make __FIXADDR_TOP a variable, so that it can be set to not get in the way of address space a hypervisor may want to reserve. Original patch by Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/fixmap.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/asm-i386/fixmap.h b/include/asm-i386/fixmap.h
index a48cc3f7ccc6..02428cb36621 100644
--- a/include/asm-i386/fixmap.h
+++ b/include/asm-i386/fixmap.h
@@ -19,7 +19,11 @@
19 * Leave one empty page between vmalloc'ed areas and 19 * Leave one empty page between vmalloc'ed areas and
20 * the start of the fixmap. 20 * the start of the fixmap.
21 */ 21 */
22#define __FIXADDR_TOP 0xfffff000 22#ifndef CONFIG_COMPAT_VDSO
23extern unsigned long __FIXADDR_TOP;
24#else
25#define __FIXADDR_TOP 0xfffff000
26#endif
23 27
24#ifndef __ASSEMBLY__ 28#ifndef __ASSEMBLY__
25#include <linux/kernel.h> 29#include <linux/kernel.h>
@@ -93,6 +97,7 @@ enum fixed_addresses {
93 97
94extern void __set_fixmap (enum fixed_addresses idx, 98extern void __set_fixmap (enum fixed_addresses idx,
95 unsigned long phys, pgprot_t flags); 99 unsigned long phys, pgprot_t flags);
100extern void reserve_top_address(unsigned long reserve);
96 101
97#define set_fixmap(idx, phys) \ 102#define set_fixmap(idx, phys) \
98 __set_fixmap(idx, phys, PAGE_KERNEL) 103 __set_fixmap(idx, phys, PAGE_KERNEL)