cregit-Linux how code gets into the kernel

Release 4.7 drivers/mtd/chips/chipreg.c

/*
 * Registration for chip drivers
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/mtd/map.h>
#include <linux/mtd/mtd.h>

static DEFINE_SPINLOCK(chip_drvs_lock);
static LIST_HEAD(chip_drvs_list);


void register_mtd_chip_driver(struct mtd_chip_driver *drv) { spin_lock(&chip_drvs_lock); list_add(&drv->list, &chip_drvs_list); spin_unlock(&chip_drvs_lock); }

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linus torvaldslinus torvalds33100.00%1100.00%
Total33100.00%1100.00%


void unregister_mtd_chip_driver(struct mtd_chip_driver *drv) { spin_lock(&chip_drvs_lock); list_del(&drv->list); spin_unlock(&chip_drvs_lock); }

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linus torvaldslinus torvalds30100.00%1100.00%
Total30100.00%1100.00%


static struct mtd_chip_driver *get_mtd_chip_driver (const char *name) { struct list_head *pos; struct mtd_chip_driver *ret = NULL, *this; spin_lock(&chip_drvs_lock); list_for_each(pos, &chip_drvs_list) { this = list_entry(pos, typeof(*this), list); if (!strcmp(this->name, name)) { ret = this; break; } } if (ret && !try_module_get(ret->module)) ret = NULL; spin_unlock(&chip_drvs_lock); return ret; }

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PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds9998.02%133.33%
christoph hellwigchristoph hellwig10.99%133.33%
david woodhousedavid woodhouse10.99%133.33%
Total101100.00%3100.00%

/* Hide all the horrid details, like some silly person taking get_module_symbol() away from us, from the caller. */
struct mtd_info *do_map_probe(const char *name, struct map_info *map) { struct mtd_chip_driver *drv; struct mtd_info *ret; drv = get_mtd_chip_driver(name); if (!drv && !request_module("%s", name)) drv = get_mtd_chip_driver(name); if (!drv) return NULL; ret = drv->probe(map); /* We decrease the use count here. It may have been a probe-only module, which is no longer required from this point, having given us a handle on (and increased the use count of) the actual driver code. */ module_put(drv->module); return ret; }

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PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds7996.34%240.00%
david woodhousedavid woodhouse11.22%120.00%
christoph hellwigchristoph hellwig11.22%120.00%
thomas gleixnerthomas gleixner11.22%120.00%
Total82100.00%5100.00%

/* * Destroy an MTD device which was created for a map device. * Make sure the MTD device is already unregistered before calling this */
void map_destroy(struct mtd_info *mtd) { struct map_info *map = mtd->priv; if (map->fldrv->destroy) map->fldrv->destroy(mtd); module_put(map->fldrv->module); kfree(mtd); }

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david woodhousedavid woodhouse50100.00%1100.00%
Total50100.00%1100.00%

EXPORT_SYMBOL(register_mtd_chip_driver); EXPORT_SYMBOL(unregister_mtd_chip_driver); EXPORT_SYMBOL(do_map_probe); EXPORT_SYMBOL(map_destroy); MODULE_LICENSE("GPL"); MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); MODULE_DESCRIPTION("Core routines for registering and invoking MTD chip drivers");

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PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds29379.84%330.00%
david woodhousedavid woodhouse6617.98%220.00%
thomas gleixnerthomas gleixner51.36%220.00%
christoph hellwigchristoph hellwig20.54%220.00%
adrian bunkadrian bunk10.27%110.00%
Total367100.00%10100.00%
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