android4.4内核移植

01 init/目录下Kconfig修改：

956行添加：

config PANIC_TIMEOUT
    int "Default panic timeout"
    default
    help
      Set default panic timeout.

02 drivers目录下Kconfig：

添加：

source "drivers/rongpin/Kconfig"

source "drivers/switch/Kconfig"

source "drivers/nfc/Kconfig"

source "drivers/gud/Kconfig"

03 drivers目录下Makefile：

添加：

obj-$(CONFIG_SWITCH)        += switch/
obj-$(CONFIG_MOBICORE_DRIVER)    += gud/
obj-$(CONFIG_RPDZKJ_SYSFS)     += rongpin/

04 drivers目录下：

将switch，gud，rongpin三个目录拷贝进来（对应原目录）

05

---------------------------------

法二：

（对比法）

荣品的内核源码和从官方下载的内核源码不一样的有如下文件：

一 ：arch

01◐arch主目录下：

①除arm、config其他全部删除

②修改config文件，在最后一行：source "kernel/gcov/Kconfig"

添加：

config HAVE_ARCH_SECCOMP_FILTER
    bool
    help
      An arch should select this symbol if it provides all of these things:
      - syscall_get_arch()
      - syscall_get_arguments()
      - syscall_rollback()
      - syscall_set_return_value()
      - SIGSYS siginfo_t support
      - secure_computing is called from a ptrace_event()-safe context
      - secure_computing return value is checked and a return value of -
        results in the system call being skipped immediately.

config SECCOMP_FILTER
    def_bool y
    depends on HAVE_ARCH_SECCOMP_FILTER && SECCOMP && NET
    help
      Enable tasks to build secure computing environments defined
      in terms of Berkeley Packet Filter programs which implement
      task-defined system call filtering polices.

      See Documentation/prctl/seccomp_filter.txt for details.

source "kernel/gcov/Kconfig"

02◐在arch/arm/configs下添加：

①exynos5_defconfig

②

二：block

1 blk-core.c文件：

①32行添加：

#include <linux/ratelimit.h>  //add by phone at 20151117

②2122行：

switch (error) {
case -ENOLINK:
error_type = "recoverable transport";
break;
case -EREMOTEIO:
error_type = "critical target";
break;
case -EBADE:
error_type = "critical nexus";
break;
case -EIO:
default:
error_type = "I/O";
break;
}
printk(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
error_type, req->rq_disk ? req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));
}

换成：

switch (error) {
case -ENOLINK:
error_type = "recoverable transport";
break;
case -EREMOTEIO:
error_type = "critical target";
break;
case -EBADE:
error_type = "critical nexus";
break;
case -ETIMEDOUT:
error_type = "timeout";
break;
case -ENOSPC:
error_type = "critical space allocation";
break;
case -ENODATA:
error_type = "critical medium";
break;
case -EIO:
default:
error_type = "I/O";
break;
}
printk_ratelimited(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
error_type, req->rq_disk ?
req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));

}

2 partition-genneric.c文件下：

①219行,添加：

static int part_uevent(struct device *dev, struct kobj_uevent_env *env)
{
    struct hd_struct *part = dev_to_part(dev);

    add_uevent_var(env, "PARTN=%u", part->partno);
    if (part->info && part->info->volname[])
        add_uevent_var(env, "PARTNAME=%s", part->info->volname);
    return ;
}

②233行添加：

.uevent        = part_uevent,

三：drivers

1 Makefile：

103行添加：

obj-$(CONFIG_SWITCH)        += switch/

139行（最后添加）：

obj-$(CONFIG_MOBICORE_DRIVER)    += gud/
obj-$(CONFIG_RPDZKJ_SYSFS)     += rongpin/

2 Kconfig：

第3行添加：

source "drivers/rongpin/Kconfig"   //add by phone at 20151117

第100行添加：

source "drivers/switch/Kconfig"   //add by phone at 20151117

第146行添加：

source "drivers/nfc/Kconfig"

source "drivers/gud/Kconfig"

3 将

四：include

五：kernel

六：lib

七：mm

八：net

九：security

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