[Xen-changelog] [linux-2.6.18-xen] xenfb: Revert mm_lock changes. They're not needed.

["Xen patchbot-linux-2.6.18-xen" <patchbot-linux-2.6.18-xen@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1233312850 0
# Node ID 26ddc59c674df460cb36651ffe58bf30e46b1638
# Parent  98897f04b338f08686eba199d6234a95cf0939f1
xenfb: Revert mm_lock changes. They're not needed.
Signed-off-by: Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>
---
 drivers/xen/fbfront/xenfb.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff -r 98897f04b338 -r 26ddc59c674d drivers/xen/fbfront/xenfb.c
--- a/drivers/xen/fbfront/xenfb.c       Fri Jan 30 10:52:47 2009 +0000
+++ b/drivers/xen/fbfront/xenfb.c       Fri Jan 30 10:54:10 2009 +0000
@@ -210,6 +210,8 @@ static void xenfb_update_screen(struct x
        if (xenfb_queue_full(info))
                return;
 
+       mutex_lock(&info->mm_lock);
+       
        spin_lock_irqsave(&info->dirty_lock, flags);
        if (info->dirty){
                info->dirty = 0;
@@ -221,12 +223,11 @@ static void xenfb_update_screen(struct x
                info->x2 = info->y2 = 0;
        } else {
                spin_unlock_irqrestore(&info->dirty_lock, flags);
+               mutex_unlock(&info->mm_lock);
                return;
        }
        spin_unlock_irqrestore(&info->dirty_lock, flags);
 
-       mutex_lock(&info->mm_lock);
-       
        list_for_each_entry(map, &info->mappings, link) {
                if (!map->faults)
                        continue;

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