linux-kernel - [rfc][patch 3/3] xfs: use new vmap API

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Message-ID: <20080728123703.GC13926@wotan.suse.de>
Date:	Mon, 28 Jul 2008 14:37:03 +0200
From:	Nick Piggin <npiggin@...e.de>
To:	Linux Memory Management List <linux-mm@...ck.org>, xfs@....sgi.com,
	xen-devel@...ts.xensource.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	dri-devel@...ts.sourceforge.net
Subject: [rfc][patch 3/3] xfs: use new vmap API


Implement XFS's large buffer support with the new vmap APIs. See the vmap
rewrite patch for some numbers.

Signed-off-by: Nick Piggin <npiggin@...e.de>
---

Index: linux-2.6/fs/xfs/linux-2.6/xfs_buf.c
===================================================================
--- linux-2.6.orig/fs/xfs/linux-2.6/xfs_buf.c
+++ linux-2.6/fs/xfs/linux-2.6/xfs_buf.c
@@ -265,7 +265,7 @@ xfs_buf_free(
 		uint		i;
 
 		if ((bp->b_flags & XBF_MAPPED) && (bp->b_page_count > 1))
-			vunmap(bp->b_addr - bp->b_offset);
+			vm_unmap_ram(bp->b_addr - bp->b_offset, bp->b_page_count);
 
 		for (i = 0; i < bp->b_page_count; i++) {
 			struct page	*page = bp->b_pages[i];
@@ -387,8 +387,8 @@ _xfs_buf_map_pages(
 		bp->b_addr = page_address(bp->b_pages[0]) + bp->b_offset;
 		bp->b_flags |= XBF_MAPPED;
 	} else if (flags & XBF_MAPPED) {
-		bp->b_addr = vmap(bp->b_pages, bp->b_page_count,
-					VM_MAP, PAGE_KERNEL);
+		bp->b_addr = vm_map_ram(bp->b_pages, bp->b_page_count,
+					-1, PAGE_KERNEL);
 		if (unlikely(bp->b_addr == NULL))
 			return -ENOMEM;
 		bp->b_addr += bp->b_offset;
--
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