litmus-rt-edfsc.git - LITMUS^RT with the EDF-SC plugin for Real-Time Systems journal paper

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author	Zelin Tong <ztong@ludwig.cs.unc.edu>	2020-07-28 14:43:39 -0400
committer	Zelin Tong <ztong@ludwig.cs.unc.edu>	2020-07-28 14:43:39 -0400
commit	721f4add1fedf8ac62d0473b886e9d379867b45f (patch)
tree	bcec00bb97eb1bc90acad54ca7bff3bd4b868056 /scripts/faddr2line
parent	098a298ef73dd8dbacf0d697eef2a6f2daa2081c (diff)

Latest ChangesHEAD wip-joshua

Diffstat (limited to 'scripts/faddr2line')

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/* bounce buffer handling for block devices
 *
 * - Split from highmem.c
 */

#include <linux/mm.h>
#include <linux/export.h>
#include <linux/swap.h>
#include <linux/gfp.h>
#include <linux/bio.h>
#include <linux/pagemap.h>
#include <linux/mempool.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/hash.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <asm/tlbflush.h>

#include <trace/events/block.h>

#define POOL_SIZE	64
#define ISA_POOL_SIZE	16

static mempool_t *page_pool, *isa_page_pool;

#if defined(CONFIG_HIGHMEM) || defined(CONFIG_NEED_BOUNCE_POOL)
static __init int init_emergency_pool(void)
{
#if defined(CONFIG_HIGHMEM) && !defined(CONFIG_MEMORY_HOTPLUG)
	if (max_pfn <= max_low_pfn)
		return 0;
#endif

	page_pool = mempool_create_page_pool(POOL_SIZE, 0);
	BUG_ON(!page_pool);
	printk("bounce pool size: %d pages\n", POOL_SIZE);

	return 0;
}

__initcall(init_emergency_pool);
#endif

#ifdef CONFIG_HIGHMEM
/*
 * highmem version, map in to vec
 */
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
{
	unsigned long flags;
	unsigned char *vto;

	local_irq_save(flags);
	vto = kmap_atomic(to->bv_page);
	memcpy(vto + to->bv_offset, vfrom, to->bv_len);
	kunmap_atomic(vto);
	local_irq_restore(flags);
}

#else /* CONFIG_HIGHMEM */

#define bounce_copy_vec(to, vfrom)	\
	memcpy(page_address((to)->bv_page) + (to)->bv_offset, vfrom, (to)->bv_len)

#endif /* CONFIG_HIGHMEM */

/*
 * allocate pages in the DMA region for the ISA pool
 */


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