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-rw-r--r--arch/x86/mm/init_32.c22
-rw-r--r--arch/x86/mm/ioremap.c24
-rw-r--r--include/asm-x86/page.h3
-rw-r--r--include/asm-x86/page_32.h1
4 files changed, 27 insertions, 23 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 7c9bb3076b8a..f7b941c3b2c3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -211,28 +211,6 @@ static inline int page_kills_ppro(unsigned long pagenr)
211 return 0; 211 return 0;
212} 212}
213 213
214int page_is_ram(unsigned long pagenr)
215{
216 int i;
217 unsigned long addr, end;
218
219 for (i = 0; i < e820.nr_map; i++) {
220
221 if (e820.map[i].type != E820_RAM) /* not usable memory */
222 continue;
223 /*
224 * !!!FIXME!!! Some BIOSen report areas as RAM that
225 * are not. Notably the 640->1Mb area. We need a sanity
226 * check here.
227 */
228 addr = (e820.map[i].addr+PAGE_SIZE-1) >> PAGE_SHIFT;
229 end = (e820.map[i].addr+e820.map[i].size) >> PAGE_SHIFT;
230 if ((pagenr >= addr) && (pagenr < end))
231 return 1;
232 }
233 return 0;
234}
235
236#ifdef CONFIG_HIGHMEM 214#ifdef CONFIG_HIGHMEM
237pte_t *kmap_pte; 215pte_t *kmap_pte;
238pgprot_t kmap_prot; 216pgprot_t kmap_prot;
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index f4a2082568c8..d3026e1906f9 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -31,6 +31,30 @@ EXPORT_SYMBOL(__phys_addr);
31 31
32#endif 32#endif
33 33
34int page_is_ram(unsigned long pagenr)
35{
36 unsigned long addr, end;
37 int i;
38
39 for (i = 0; i < e820.nr_map; i++) {
40 /*
41 * Not usable memory:
42 */
43 if (e820.map[i].type != E820_RAM)
44 continue;
45 /*
46 * !!!FIXME!!! Some BIOSen report areas as RAM that
47 * are not. Notably the 640->1Mb area. We need a sanity
48 * check here.
49 */
50 addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
51 end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
52 if ((pagenr >= addr) && (pagenr < end))
53 return 1;
54 }
55 return 0;
56}
57
34/* 58/*
35 * Fix up the linear direct mapping of the kernel to avoid cache attribute 59 * Fix up the linear direct mapping of the kernel to avoid cache attribute
36 * conflicts. 60 * conflicts.
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index e2c79d8dcdcf..c8b30efeed85 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -47,6 +47,9 @@
47 47
48 48
49#ifndef __ASSEMBLY__ 49#ifndef __ASSEMBLY__
50
51extern int page_is_ram(unsigned long pagenr);
52
50struct page; 53struct page;
51 54
52static void inline clear_user_page(void *page, unsigned long vaddr, 55static void inline clear_user_page(void *page, unsigned long vaddr,
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index 11c4b39cada1..a6fd10f230d2 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -73,7 +73,6 @@ extern int nx_enabled;
73 */ 73 */
74extern unsigned int __VMALLOC_RESERVE; 74extern unsigned int __VMALLOC_RESERVE;
75extern int sysctl_legacy_va_layout; 75extern int sysctl_legacy_va_layout;
76extern int page_is_ram(unsigned long pagenr);
77 76
78#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) 77#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
79#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) 78#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)