linux-imx

/*

 * Functions related to setting various queue properties from drivers

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/bio.h>

#include <linux/blkdev.h>

#include <linux/memblock.h> /* for max_pfn/max_low_pfn */

#include <linux/gcd.h>

#include <linux/lcm.h>

#include <linux/jiffies.h>

#include <linux/gfp.h>

​

#include "blk.h"

#include "blk-wbt.h"

​

unsigned long blk_max_low_pfn;

EXPORT_SYMBOL(blk_max_low_pfn);

​

unsigned long blk_max_pfn;

​

void blk_queue_rq_timeout(struct request_queue *q, unsigned int timeout)

{

    q->rq_timeout = timeout;

}

EXPORT_SYMBOL_GPL(blk_queue_rq_timeout);

​

/**

 * blk_set_default_limits - reset limits to default values

 * @lim:  the queue_limits structure to reset

 *

 * Description:

 *   Returns a queue_limit struct to its default state.

 */

void blk_set_default_limits(struct queue_limits *lim)

{

    lim->max_segments = BLK_MAX_SEGMENTS;

    lim->max_discard_segments = 1;

    lim->max_integrity_segments = 0;

    lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;

    lim->virt_boundary_mask = 0;

    lim->max_segment_size = BLK_MAX_SEGMENT_SIZE;

    lim->max_sectors = lim->max_hw_sectors = BLK_SAFE_MAX_SECTORS;

    lim->max_dev_sectors = 0;

    lim->chunk_sectors = 0;

    lim->max_write_same_sectors = 0;

    lim->max_write_zeroes_sectors = 0;

    lim->max_discard_sectors = 0;

    lim->max_hw_discard_sectors = 0;

    lim->discard_granularity = 0;

    lim->discard_alignment = 0;

    lim->discard_misaligned = 0;

    lim->logical_block_size = lim->physical_block_size = lim->io_min = 512;

    lim->bounce_pfn = (unsigned long)(BLK_BOUNCE_ANY >> PAGE_SHIFT);

    lim->alignment_offset = 0;

    lim->io_opt = 0;

    lim->misaligned = 0;

    lim->zoned = BLK_ZONED_NONE;

}

EXPORT_SYMBOL(blk_set_default_limits);

​

/**