android内核编译中的错误

Question

根据这些使用说明，我正试图为三星Galaxy编译安卓内核(氰原)：

我用的是CM-7。

我执行了以下步骤：

1. 下载内核源代码。
2. 配置构建： adb拉/proc/config.gz /home/user_name/android/kernel/cm-kernel/config.gz cat config.gz _ gunzip > .config make ARCH=arm CROSS_COMPILE=$CCOMPILER menuconfig
3. 建造： 制造ARCH=arm CROSS_COMPILE=$CCOMPILER -j4

在这个内核开始编译并且一切都正常运行之后，它报告了一个似乎是源代码中的错误的错误，下面是终端中的输出。

 kernel/cpuset.c:1385: error: ‘task’ undeclared (first use in this
 function)
 kernel/cpuset.c:1385: error: (Each undeclared identifier is reported
 only once
 kernel/cpuset.c:1385: error: for each function it appears in.)
 kernel/cpuset.c: In function ‘cpuset_print_task_mems_allowed’: 
  CC [M]  fs/ceph/snap.o
  CC [M]  crypto/seed.o
  CC [M]  fs/btrfs/disk-io.o
  CC [M]  fs/cifs/connect.o
  CC [M]  fs/ceph/xattr.o
  CC [M]  crypto/salsa20_generic.o
  CC [M]  crypto/deflate.o
  CC [M]  fs/ceph/mds_client.o
  CC [M]  crypto/zlib.o
  CC [M]  fs/btrfs/transaction.o
  CC [M]  crypto/michael_mic.o
  CC [M]  crypto/authenc.o
  CC [M]  fs/ceph/mdsmap.o
  CC [M]  fs/cifs/dir.o
  CC [M]  fs/ceph/strings.o
  CC [M]  fs/btrfs/inode.o
  CC [M]  fs/ceph/ceph_frag.o
  CC [M]  crypto/lzo.o
  CC [M]  fs/ceph/debugfs.o
  CC [M]  crypto/ansi_cprng.o
  CC [M]  fs/cifs/file.o
  LD [M]  fs/ceph/ceph.o
  LD      fs/coda/built-in.o
  CC [M]  fs/coda/psdev.o
  CC [M]  crypto/tcrypt.o
fs/cifs/file.c: In function 'cifs_write':
fs/cifs/file.c:1036: warning: format '%zd' expects type 'signed size_t', but argument     3     has type 'size_t'
In file included from fs/coda/psdev.c:45:
include/linux/coda.h:223: error: expected specifier-qualifier-list before 'u_quad_t'
make[2]: *** [fs/coda/psdev.o] Error 1
make[1]: *** [fs/coda] Error 2
make[1]: *** Waiting for unfinished jobs....
CC [M]  crypto/ghash-generic.o
CC [M]  crypto/xor.o
include/asm-generic/xor.h:696: warning: 'xor_block_8regs_p' defined but not used
include/asm-generic/xor.h:704: warning: 'xor_block_32regs_p' defined but not used
CC [M]  fs/cifs/inode.o
LD      crypto/async_tx/built-in.o
CC [M]  crypto/async_tx/async_tx.o
CC [M]  crypto/async_tx/async_memcpy.o
CC [M]  fs/btrfs/file.o
CC [M]  fs/btrfs/tree-defrag.o
crypto/async_tx/async_memcpy.c: In function 'async_memcpy':
crypto/async_tx/async_memcpy.c:72: warning: format '%zu' expects type 'size_t', but         argument 3 has type 'unsigned int'
crypto/async_tx/async_memcpy.c:76: warning: format '%zu' expects type 'size_t', but     argument 3 has type 'unsigned int'
CC [M]  crypto/async_tx/async_xor.o
CC [M]  fs/btrfs/extent_map.o
crypto/async_tx/async_xor.c: In function 'async_xor':
crypto/async_tx/async_xor.c:202: warning: format '%zu' expects type 'size_t', but         argument 3 has type 'unsigned int'
crypto/async_tx/async_xor.c:208: warning: format '%zu' expects type 'size_t', but     argument 3 has type 'unsigned int'
crypto/async_tx/async_xor.c: In function 'async_xor_val':
crypto/async_tx/async_xor.c:286: warning: format '%zu' expects type 'size_t', but argument 3 has type 'unsigned int'
crypto/async_tx/async_xor.c:314: warning: format '%zu' expects type 'size_t', but argument 3 has type 'unsigned int'
CC [M]  crypto/async_tx/async_pq.o
CC [M]  fs/btrfs/sysfs.o
crypto/async_tx/async_pq.c: In function 'async_gen_syndrome':
crypto/async_tx/async_pq.c:218: warning: format '%zu' expects type 'size_t', but  argument 4 has type 'unsigned int'
crypto/async_tx/async_pq.c:225: warning: format '%zu' expects type 'size_t', but  argument 4 has type 'unsigned int'
crypto/async_tx/async_pq.c: In function 'async_syndrome_val':
crypto/async_tx/async_pq.c:295: warning: format '%zu' expects type 'size_t', but  argument 4 has type 'unsigned int'
crypto/async_tx/async_pq.c:344: warning: format '%zu' expects type 'size_t', but argument 4 has type 'unsigned int'
CC [M]  fs/btrfs/struct-funcs.o
CC [M]  fs/cifs/link.o
CC [M]  fs/btrfs/xattr.o
CC [M]  crypto/async_tx/async_raid6_recov.o
crypto/async_tx/async_raid6_recov.c: In function 'async_raid6_2data_recov':
crypto/async_tx/async_raid6_recov.c:334: warning: format '%zu' expects type 'size_t', but argument 4 has type 'unsigned int'
crypto/async_tx/async_raid6_recov.c: In function 'async_raid6_datap_recov':
crypto/async_tx/async_raid6_recov.c:410: warning: format '%zu' expects type 'size_t', but argument 4 has type 'unsigned int'
CC [M]  fs/cifs/misc.o
CC [M]  fs/btrfs/ordered-data.o
CC [M]  crypto/async_tx/raid6test.o
LD      crypto/crypto.o
LD      crypto/built-in.o
CC [M]  fs/btrfs/extent_io.o
CC [M]  fs/btrfs/volumes.o
CC [M]  fs/cifs/netmisc.o
CC [M]  fs/cifs/smbdes.o
CC [M]  fs/cifs/smbencrypt.o
CC  [M]  fs/cifs/transport.o
CC [M]  fs/cifs/asn1.o
CC [M]  fs/btrfs/async-thread.o
CC [M]  fs/cifs/md4.o
CC [M]  fs/cifs/md5.o
CC [M]  fs/cifs/cifs_unicode.o
CC [M]  fs/btrfs/ioctl.o
CC [M]  fs/btrfs/locking.o
CC [M]  fs/cifs/nterr.o
CC [M]  fs/cifs/xattr.o
CC [M]  fs/cifs/cifsencrypt.o
CC [M]  fs/btrfs/orphan.o
CC [M]  fs/cifs/readdir.o
CC [M]  fs/btrfs/export.o
CC [M]  fs/cifs/ioctl.o
CC [M]  fs/btrfs/tree-log.o
CC [M]  fs/btrfs/acl.o
CC [M]  fs/btrfs/free-space-cache.o
CC [M]  fs/cifs/sess.o
CC [M]  fs/btrfs/zlib.o
CC [M]  fs/btrfs/compression.o
CC [M]  fs/cifs/export.o
CC [M]  fs/btrfs/delayed-ref.o
CC [M]  fs/btrfs/relocation.o
CC [M]  fs/cifs/cifs_spnego.o
CC [M]  fs/cifs/dns_resolve.o
CC [M]  fs/cifs/cifs_dfs_ref.o
LD [M]  fs/cifs/cifs.o
LD [M]  fs/btrfs/btrfs.o
make: *** [fs] Error 2

如果有人能告诉我如何解决这个问题。

Answer 1

源代码、文件、第1385行的内核/cpuet.c中都有错误，使用的是'task‘，因为它应该是'tsk’，而且它后来被使用而没有被分配值。它应该以这样的方式被赋值：__task_cred(tsk)。

这是原始代码：

/* Called by cgroups to determine if a cpuset is usable; cgroup_mutex held */
static int cpuset_can_attach(struct cgroup_subsys *ss, struct cgroup *cont,
             struct task_struct *tsk, bool threadgroup)
{
int ret;
struct cpuset *cs = cgroup_cs(cont);

if ((current != task) && (!capable(CAP_SYS_ADMIN))) {
    const struct cred *cred = current_cred(), *tcred;

    if (cred->euid != tcred->uid && cred->euid != tcred->suid)
        return -EPERM;
}

..

这是修改后的代码：

/* Called by cgroups to determine if a cpuset is usable; cgroup_mutex held */
static int cpuset_can_attach(struct cgroup_subsys *ss, struct cgroup *cont,
             struct task_struct *tsk, bool threadgroup)
{
int ret;
struct cpuset *cs = cgroup_cs(cont);

if ((current != tsk) && (!capable(CAP_SYS_ADMIN))) {
    const struct cred *cred = current_cred(), *tcred;
    tcred = __task_cred(tsk); 

    if (cred->euid != tcred->uid && cred->euid != tcred->suid)
        return -EPERM;
}

这个链接解释了在编译android内核时可能发生的不同错误。