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Update 2.6.x-xfs to 2.6.23-rc4.

Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:

--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
    xfs ioctl __user annotations

commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
    mm: Remove slab destructors from kmem_cache_create().

commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
    mm: fault feedback #1

commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
    mm: merge populate and nopage into fault (fixes nonlinear)

commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
    mm: fix fault vs invalidate race for linear mappings

commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
    knfsd: exportfs: add exportfs.h header

commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Freezer: make kernel threads nonfreezable by default

commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
    mm: clean up and kernelify shrinker registration

commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
    sendfile: remove .sendfile from filesystems that use generic_file_sendfile()

commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Add suspend-related notifications for CPU hotplug

commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
    Fix occurrences of "the the "

commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
    mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

/* $Date: 2007/09/12 17:09:56 $ $RCSfile: tp.c,v $ $Revision: 1.8 $ */
#include "common.h"
#include "regs.h"
#include "tp.h"
#ifdef CONFIG_CHELSIO_T1_1G
#include "fpga_defs.h"
#endif

struct petp {
	adapter_t *adapter;
};

/* Pause deadlock avoidance parameters */
#define DROP_MSEC 16
#define DROP_PKTS_CNT  1

static void tp_init(adapter_t * ap, const struct tp_params *p,
		    unsigned int tp_clk)
{
	u32 val;

	if (!t1_is_asic(ap))
		return;

	val = F_TP_IN_CSPI_CPL | F_TP_IN_CSPI_CHECK_IP_CSUM |
		F_TP_IN_CSPI_CHECK_TCP_CSUM | F_TP_IN_ESPI_ETHERNET;
	if (!p->pm_size)
		val |= F_OFFLOAD_DISABLE;
	else
		val |= F_TP_IN_ESPI_CHECK_IP_CSUM | F_TP_IN_ESPI_CHECK_TCP_CSUM;
	writel(val, ap->regs + A_TP_IN_CONFIG);
	writel(F_TP_OUT_CSPI_CPL |
	       F_TP_OUT_ESPI_ETHERNET |
	       F_TP_OUT_ESPI_GENERATE_IP_CSUM |
	       F_TP_OUT_ESPI_GENERATE_TCP_CSUM, ap->regs + A_TP_OUT_CONFIG);
	writel(V_IP_TTL(64) |
	       F_PATH_MTU /* IP DF bit */  |
	       V_5TUPLE_LOOKUP(p->use_5tuple_mode) |
	       V_SYN_COOKIE_PARAMETER(29), ap->regs + A_TP_GLOBAL_CONFIG);
	/*
	 * Enable pause frame deadlock prevention.
	 */
	if (is_T2(ap) && ap->params.nports > 1) {
		u32 drop_ticks = DROP_MSEC * (tp_clk / 1000);

		writel(F_ENABLE_TX_DROP | F_ENABLE_TX_ERROR |
		       V_DROP_TICKS_CNT(drop_ticks) |
		       V_NUM_PKTS_DROPPED(DROP_PKTS_CNT),
		       ap->regs + A_TP_TX_DROP_CONFIG);
	}
}

void t1_tp_destroy(struct petp *tp)
{
	kfree(tp);
}

struct petp *__devinit t1_tp_create(adapter_t * adapter, struct tp_params *p)
{
	struct petp *tp = kzalloc(sizeof(*tp), GFP_KERNEL);

	if (!tp)
		return NULL;

	tp->adapter = adapter;

	return tp;
}

void t1_tp_intr_enable(struct petp *tp)
{
	u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);

#ifdef CONFIG_CHELSIO_T1_1G
	if (!t1_is_asic(tp->adapter)) {
		/* FPGA */
		writel(0xffffffff,
		       tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);
		writel(tp_intr | FPGA_PCIX_INTERRUPT_TP,
		       tp->adapter->regs + A_PL_ENABLE);
	} else
#endif
	{
		/* We don't use any TP interrupts */
		writel(0, tp->adapter->regs + A_TP_INT_ENABLE);
		writel(tp_intr | F_PL_INTR_TP,
		       tp->adapter->regs + A_PL_ENABLE);
	}
}

void t1_tp_intr_disable(struct petp *tp)
{
	u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);

#ifdef CONFIG_CHELSIO_T1_1G
	if (!t1_is_asic(tp->adapter)) {
		/* FPGA */
		writel(0, tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);
		writel(tp_intr & ~FPGA_PCIX_INTERRUPT_TP,
		       tp->adapter->regs + A_PL_ENABLE);
	} else
#endif
	{
		writel(0, tp->adapter->regs + A_TP_INT_ENABLE);
		writel(tp_intr & ~F_PL_INTR_TP,
		       tp->adapter->regs + A_PL_ENABLE);
	}
}

void t1_tp_intr_clear(struct petp *tp)
{
#ifdef CONFIG_CHELSIO_T1_1G
	if (!t1_is_asic(tp->adapter)) {
		writel(0xffffffff,
		       tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_CAUSE);
		writel(FPGA_PCIX_INTERRUPT_TP, tp->adapter->regs + A_PL_CAUSE);
		return;
	}
#endif
	writel(0xffffffff, tp->adapter->regs + A_TP_INT_CAUSE);
	writel(F_PL_INTR_TP, tp->adapter->regs + A_PL_CAUSE);
}

int t1_tp_intr_handler(struct petp *tp)
{
	u32 cause;

#ifdef CONFIG_CHELSIO_T1_1G
	/* FPGA doesn't support TP interrupts. */
	if (!t1_is_asic(tp->adapter))
		return 1;
#endif

	cause = readl(tp->adapter->regs + A_TP_INT_CAUSE);
	writel(cause, tp->adapter->regs + A_TP_INT_CAUSE);
	return 0;
}

static void set_csum_offload(struct petp *tp, u32 csum_bit, int enable)
{
	u32 val = readl(tp->adapter->regs + A_TP_GLOBAL_CONFIG);

	if (enable)
		val |= csum_bit;
	else
		val &= ~csum_bit;
	writel(val, tp->adapter->regs + A_TP_GLOBAL_CONFIG);
}

void t1_tp_set_ip_checksum_offload(struct petp *tp, int enable)
{
	set_csum_offload(tp, F_IP_CSUM, enable);
}

void t1_tp_set_udp_checksum_offload(struct petp *tp, int enable)
{
	set_csum_offload(tp, F_UDP_CSUM, enable);
}

void t1_tp_set_tcp_checksum_offload(struct petp *tp, int enable)
{
	set_csum_offload(tp, F_TCP_CSUM, enable);
}

/*
 * Initialize TP state.  tp_params contains initial settings for some TP
 * parameters, particularly the one-time PM and CM settings.
 */
int t1_tp_reset(struct petp *tp, struct tp_params *p, unsigned int tp_clk)
{
	adapter_t *adapter = tp->adapter;

	tp_init(adapter, p, tp_clk);
	writel(F_TP_RESET, adapter->regs +  A_TP_RESET);
	return 0;
}