cregit-Linux how code gets into the kernel

Release 4.7 include/linux/devcoredump.h

Directory: include/linux
/*
 * This file is provided under the GPLv2 license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2015 Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 */
#ifndef __DEVCOREDUMP_H

#define __DEVCOREDUMP_H

#include <linux/device.h>
#include <linux/module.h>
#include <linux/vmalloc.h>

#include <linux/scatterlist.h>
#include <linux/slab.h>

/*
 * _devcd_free_sgtable - free all the memory of the given scatterlist table
 * (i.e. both pages and scatterlist instances)
 * NOTE: if two tables allocated and chained using the sg_chain function then
 * this function should be called only once on the first table
 * @table: pointer to sg_table to free
 */

static inline void _devcd_free_sgtable(struct scatterlist *table) { int i; struct page *page; struct scatterlist *iter; struct scatterlist *delete_iter; /* free pages */ iter = table; for_each_sg(table, iter, sg_nents(table), i) { page = sg_page(iter); if (page) __free_page(page); } /* then free all chained tables */ iter = table; delete_iter = table; /* always points on a head of a table */ while (!sg_is_last(iter)) { iter++; if (sg_is_chain(iter)) { iter = sg_chain_ptr(iter); kfree(delete_iter); delete_iter = iter; } } /* free the last table */ kfree(delete_iter); }

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#ifdef CONFIG_DEV_COREDUMP void dev_coredumpv(struct device *dev, void *data, size_t datalen, gfp_t gfp); void dev_coredumpm(struct device *dev, struct module *owner, void *data, size_t datalen, gfp_t gfp, ssize_t (*read)(char *buffer, loff_t offset, size_t count, void *data, size_t datalen), void (*free)(void *data)); void dev_coredumpsg(struct device *dev, struct scatterlist *table, size_t datalen, gfp_t gfp); #else
static inline void dev_coredumpv(struct device *dev, void *data, size_t datalen, gfp_t gfp) { vfree(data); }

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johannes bergjohannes berg27100.00%1100.00%
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static inline void dev_coredumpm(struct device *dev, struct module *owner, void *data, size_t datalen, gfp_t gfp, ssize_t (*read)(char *buffer, loff_t offset, size_t count, void *data, size_t datalen), void (*free)(void *data)) { free(data); }

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johannes bergjohannes berg67100.00%1100.00%
Total67100.00%1100.00%


static inline void dev_coredumpsg(struct device *dev, struct scatterlist *table, size_t datalen, gfp_t gfp) { _devcd_free_sgtable(table); }

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#endif /* CONFIG_DEV_COREDUMP */ #endif /* __DEVCOREDUMP_H */

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johannes bergjohannes berg19853.37%150.00%
aviya erenfeldaviya erenfeld17346.63%150.00%
Total371100.00%2100.00%
Directory: include/linux
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