Revision 8ef8286689c6b5bc76212437b85bdd2ba749ee44 authored by Christoph Lameter on 20 February 2007, 21:57:52 UTC, committed by Linus Torvalds on 21 February 2007, 01:10:13 UTC
The alien cache is a per cpu per node array allocated for every slab on the system. Currently we size this array for all nodes that the kernel does support. For IA64 this is 1024 nodes. So we allocate an array with 1024 objects even if we only boot a system with 4 nodes. This patch uses "nr_node_ids" to determine the number of possible nodes supported by a hardware configuration and only allocates an alien cache sized for possible nodes. The initialization of nr_node_ids occurred too late relative to the bootstrap of the slab allocator and so I moved the setup_nr_node_ids() into free_area_init_nodes(). Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 53b8a31
fb_ddc.c
/*
* driver/vide/fb_ddc.c - DDC/EDID read support.
*
* Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/fb.h>
#include <linux/i2c-algo-bit.h>
#include "edid.h"
#define DDC_ADDR 0x50
static unsigned char *fb_do_probe_ddc_edid(struct i2c_adapter *adapter)
{
unsigned char start = 0x0;
unsigned char *buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
struct i2c_msg msgs[] = {
{
.addr = DDC_ADDR,
.flags = 0,
.len = 1,
.buf = &start,
}, {
.addr = DDC_ADDR,
.flags = I2C_M_RD,
.len = EDID_LENGTH,
.buf = buf,
}
};
if (!buf) {
dev_warn(&adapter->dev, "unable to allocate memory for EDID "
"block.\n");
return NULL;
}
if (i2c_transfer(adapter, msgs, 2) == 2)
return buf;
dev_warn(&adapter->dev, "unable to read EDID block.\n");
kfree(buf);
return NULL;
}
unsigned char *fb_ddc_read(struct i2c_adapter *adapter)
{
struct i2c_algo_bit_data *algo_data = adapter->algo_data;
unsigned char *edid = NULL;
int i, j;
algo_data->setscl(algo_data->data, 1);
algo_data->setscl(algo_data->data, 0);
for (i = 0; i < 3; i++) {
/* For some old monitors we need the
* following process to initialize/stop DDC
*/
algo_data->setsda(algo_data->data, 0);
msleep(13);
algo_data->setscl(algo_data->data, 1);
for (j = 0; j < 5; j++) {
msleep(10);
if (algo_data->getscl(algo_data->data))
break;
}
if (j == 5)
continue;
algo_data->setsda(algo_data->data, 0);
msleep(15);
algo_data->setscl(algo_data->data, 0);
msleep(15);
algo_data->setsda(algo_data->data, 1);
msleep(15);
/* Do the real work */
edid = fb_do_probe_ddc_edid(adapter);
algo_data->setsda(algo_data->data, 0);
algo_data->setscl(algo_data->data, 0);
msleep(15);
algo_data->setscl(algo_data->data, 1);
for (j = 0; j < 10; j++) {
msleep(10);
if (algo_data->getscl(algo_data->data))
break;
}
algo_data->setsda(algo_data->data, 1);
msleep(15);
algo_data->setscl(algo_data->data, 0);
if (edid)
break;
}
/* Release the DDC lines when done or the Apple Cinema HD display
* will switch off
*/
algo_data->setsda(algo_data->data, 0);
algo_data->setscl(algo_data->data, 0);
return edid;
}
EXPORT_SYMBOL_GPL(fb_ddc_read);
MODULE_AUTHOR("Dennis Munsie <dmunsie@cecropia.com>");
MODULE_DESCRIPTION("DDC/EDID reading support");
MODULE_LICENSE("GPL");
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...