Re: [patch 1/7] mm: introduce VM_MIXEDMAP

[Carsten Otte <cotte@de.ibm.com>]

Am Montag, den 31.03.2008, 15:04 -0700 schrieb Andrew Morton:
> [7/7] needs to be redone please - git-s390 makes functional changes to
> add_shared_memory().

This patch removes struct page entries for DCSS segments that are being loaded.
They can still be accessed correctly, thanks to the struct page-less XIP work
of previous patches.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
---
 arch/s390/mm/vmem.c |   18 +-----------------
 1 files changed, 1 insertion(+), 17 deletions(-)

Index: linux-2.6-marist/arch/s390/mm/vmem.c
===================================================================
--- linux-2.6-marist.orig/arch/s390/mm/vmem.c
+++ linux-2.6-marist/arch/s390/mm/vmem.c
@@ -343,8 +343,6 @@ out:
 int add_shared_memory(unsigned long start, unsigned long size)
 {
 	struct memory_segment *seg;
-	struct page *page;
-	unsigned long pfn, num_pfn, end_pfn;
 	int ret;
 
 	mutex_lock(&vmem_mutex);
@@ -359,24 +357,10 @@ int add_shared_memory(unsigned long star
 	if (ret)
 		goto out_free;
 
-	ret = vmem_add_mem(start, size, 0);
+	ret = vmem_add_range(start, size, 0);
 	if (ret)
 		goto out_remove;
 
-	pfn = PFN_DOWN(start);
-	num_pfn = PFN_DOWN(size);
-	end_pfn = pfn + num_pfn;
-
-	page = pfn_to_page(pfn);
-	memset(page, 0, num_pfn * sizeof(struct page));
-
-	for (; pfn < end_pfn; pfn++) {
-		page = pfn_to_page(pfn);
-		init_page_count(page);
-		reset_page_mapcount(page);
-		SetPageReserved(page);
-		INIT_LIST_HEAD(&page->lru);
-	}
 	goto out;
 
 out_remove:


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