[sashal-linux-stable-security:linux-3.10.y-security 244/1389] ipc/shm.c:206:22: error: 'shm_rcu_free' undeclared

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

Hi Greg,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable-security.git linux-3.10.y-security
head:   69c2f7bfd1c3f78cff79345a7d013684c2014325
commit: cc1983ffd188ab8ce2bcf3df48f08aa11e018165 [244/1389] ipc,shm: fix shm_file deletion races
config: i386-randconfig-s1-201636 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.3-14) 4.9.3
reproduce:
        git checkout cc1983ffd188ab8ce2bcf3df48f08aa11e018165
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   ipc/shm.c: In function 'shm_destroy':
>> ipc/shm.c:206:22: error: 'shm_rcu_free' undeclared (first use in this function)
     ipc_rcu_putref(shp, shm_rcu_free);
                         ^
   ipc/shm.c:206:22: note: each undeclared identifier is reported only once for each function it appears in
>> ipc/shm.c:206:2: error: too many arguments to function 'ipc_rcu_putref'
     ipc_rcu_putref(shp, shm_rcu_free);
     ^
   In file included from ipc/shm.c:48:0:
   ipc/util.h:123:6: note: declared here
    void ipc_rcu_putref(void *ptr);
         ^
   ipc/shm.c: In function 'SYSC_shmctl':
   ipc/shm.c:929:3: error: implicit declaration of function 'shm_obtain_object_check' [-Werror=implicit-function-declaration]
      shp = shm_obtain_object_check(ns, shmid);
      ^
   ipc/shm.c:929:7: warning: assignment makes pointer from integer without a cast
      shp = shm_obtain_object_check(ns, shmid);
          ^
   ipc/shm.c:979:3: error: implicit declaration of function 'ipc_unlock_object' [-Werror=implicit-function-declaration]
      ipc_unlock_object(&shp->shm_perm);
      ^
   ipc/shm.c: In function 'do_shmat':
   ipc/shm.c:1062:6: warning: assignment makes pointer from integer without a cast
     shp = shm_obtain_object_check(ns, shmid);
         ^
   cc1: some warnings being treated as errors

vim +/shm_rcu_free +206 ipc/shm.c

   200		if (!is_file_hugepages(shm_file))
   201			shmem_lock(shm_file, 0, shp->mlock_user);
   202		else if (shp->mlock_user)
   203			user_shm_unlock(file_inode(shm_file)->i_size, shp->mlock_user);
   204		fput(shm_file);
   205		security_shm_free(shp);
 > 206		ipc_rcu_putref(shp, shm_rcu_free);
   207	}
   208	
   209	/*

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