[PATCH] hugetlb: remove /proc/ intrusion

Patch from William Lee Irwin III <wli@holomorphy.com>

This patch removes hugetlb's intrusion into /proc/

arch/i386/mm/hugetlbpage.c

@@ -582,6 +582,17 @@ static int __init hugetlb_init(void)
 }
 module_init(hugetlb_init);
 
+int hugetlb_report_meminfo(char *buf)
+{
+	return sprintf(buf,
+			"HugePages_Total: %5lu\n"
+			"HugePages_Free:  %5lu\n"
+			"Hugepagesize:    %5lu kB\n",
+			htlbzone_pages,
+			htlbpagemem,
+			HPAGE_SIZE/1024);
+}
+
 static struct page * hugetlb_nopage(struct vm_area_struct * area, unsigned long address, int unused)
 {
 	BUG();

fs/proc/proc_misc.c

@@ -40,7 +40,7 @@
 #include <linux/times.h>
 #include <linux/profile.h>
 #include <linux/blkdev.h>
-
+#include <linux/hugetlb.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/io.h>
@@ -199,19 +199,8 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
 		ps.nr_reverse_maps
 		);
 
-#ifdef CONFIG_HUGETLB_PAGE
-	{
-		extern unsigned long htlbpagemem, htlbzone_pages;
-		len += sprintf(page + len,
-				"HugePages_Total: %5lu\n"
-				"HugePages_Free:  %5lu\n"
-				"Hugepagesize:    %5lu kB\n",
-				htlbzone_pages,
-				htlbpagemem,
-				HPAGE_SIZE/1024);
-	}
+		len += hugetlb_report_meminfo(page + len);
 
-#endif
 	return proc_calc_metrics(page, start, off, count, eof, len);
 #undef K
 }

include/linux/hugetlb.h

@@ -17,6 +17,7 @@ void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
 void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
 int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
 void huge_page_release(struct page *);
+int hugetlb_report_meminfo(char *);
 
 extern int htlbpage_max;
 
@@ -32,6 +33,7 @@ static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
 #define zap_hugepage_range(vma, start, len)	BUG()
 #define unmap_hugepage_range(vma, start, end)	BUG()
 #define huge_page_release(page)			BUG()
+#define hugetlb_report_meminfo(buf)		0
 
 #endif /* !CONFIG_HUGETLB_PAGE */