uml: fix the highmem build error

This patch fixes this error:

arch/um/kernel/mem.c: In function ‘init_highmem’:
arch/um/kernel/mem.c:177: error: ‘pkmap_page_table’ undeclared (first use in this function)
arch/um/kernel/mem.c:177: error: (Each undeclared identifier is reported only once
arch/um/kernel/mem.c:177: error: for each function it appears in.)

Compile and run tested.

---

index 69c0252..4e656c9 100644
@@ -40,6 +40,9 @@ enum fixed_addresses {
 #endif
 	__end_of_fixed_addresses
 };
+extern pte_t *pkmap_page_table;
+extern pte_t *kmap_pte;
+extern pgprot_t kmap_prot;
 
 extern void __set_fixmap (enum fixed_addresses idx,
 			  unsigned long phys, pgprot_t flags);

index bcc079c..884f9e2 100644
@@ -1,3 +1,4 @@
+#include <asm/fixmap.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
 

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On Thu, Nov 27, 2008 at 6:12 PM, Américo Wang <[email protected]> wrote:>> This patch fixes this error:>> arch/um/kernel/mem.c: In function 'init_highmem':> arch/um/kernel/mem.c:177: error: 'pkmap_page_table' undeclared (first> use in this function)> arch/um/kernel/mem.c:177: error: (Each undeclared identifier is> reported only once> arch/um/kernel/mem.c:177: error: for each function it appears in.)>> Compile and run tested.> Ignore the above one, below is the updated version.
------->
This patch fixes this error:
arch/um/kernel/mem.c: In function 'init_highmem':arch/um/kernel/mem.c:177: error: 'pkmap_page_table' undeclared (firstuse in this function)arch/um/kernel/mem.c:177: error: (Each undeclared identifier isreported only oncearch/um/kernel/mem.c:177: error: for each function it appears in.)

+#ifdef CONFIG_HIGHMEM+extern pte_t *pkmap_page_table;+extern pte_t *kmap_pte;+extern pgprot_t kmap_prot;+#endif+ extern void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags);