x86: add e820_remove_range

... so could add real hole in e820

agp check is using request_mem_region, and could fail if e820 is reserved...

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h
index 0e92b6a2ea00..7c32df07bae4 100644
--- a/include/asm-x86/e820.h
+++ b/include/asm-x86/e820.h
@@ -67,6 +67,8 @@ sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map);
 extern int copy_e820_map(struct e820entry *biosmap, int nr_map);
 extern u64 e820_update_range(u64 start, u64 size, unsigned old_type,
                                unsigned new_type);
+extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
+                             int checktype);
 extern void update_e820(void);
 extern void e820_setup_gap(void);
 struct setup_data;