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Subject[PATCH 2/2] UML memory hotplug cleanups
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Change memory hotplug to use GFP_NOWAIT instead of GFP_ATOMIC, so that it
will grab memory without sleeping, but doesn't try to use the emergency pools.

A small list initialization suggested by Daniel Phillips - don't initialize
lists which are just about to be list_add-ed.

Signed-off-by: Jeff Dike <jdike@addtoit.com>

Index: linux-2.6.16/arch/um/drivers/mconsole_kern.c
===================================================================
--- linux-2.6.16.orig/arch/um/drivers/mconsole_kern.c 2006-04-06 12:10:41.000000000 -0400
+++ linux-2.6.16/arch/um/drivers/mconsole_kern.c 2006-04-06 12:21:07.000000000 -0400
@@ -87,7 +87,7 @@ static irqreturn_t mconsole_interrupt(in
if(req.cmd->context == MCONSOLE_INTR)
(*req.cmd->handler)(&req);
else {
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ new = kmalloc(sizeof(*new), GFP_NOWAIT);
if(new == NULL)
mconsole_reply(&req, "Out of memory", 1, 0);
else {
@@ -415,7 +415,6 @@ static int mem_config(char *str)

unplugged = page_address(page);
if(unplug_index == UNPLUGGED_PER_PAGE){
- INIT_LIST_HEAD(&unplugged->list);
list_add(&unplugged->list, &unplugged_pages);
unplug_index = 0;
}
@@ -655,7 +654,6 @@ static void with_console(struct mc_reque
struct mconsole_entry entry;
unsigned long flags;

- INIT_LIST_HEAD(&entry.list);
entry.request = *req;
list_add(&entry.list, &clients);
spin_lock_irqsave(&console_lock, flags);
-
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