linux-kernel - [tip:WIP.sched/core 117/122] drivers/misc/vmw_vmci/vmci_host.c:321:9: error: implicit declaration of function 'get_current

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Date:   Fri, 3 Feb 2017 06:52:07 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, tipbuild@...or.com
Subject: [tip:WIP.sched/core 117/122]
 drivers/misc/vmw_vmci/vmci_host.c:321:9: error: implicit declaration of
 function 'get_current_cred'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   a69a38e26e87ddbe993e33b55f693405cd62c76f
commit: bcdc18d4a46bc321d73fa769cfe294cf3cdae07d [117/122] sched/headers: Remove <linux/cred.h> inclusion from <linux/sched.h>
config: x86_64-randconfig-s4-02030507 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout bcdc18d4a46bc321d73fa769cfe294cf3cdae07d
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   drivers/misc/vmw_vmci/vmci_host.c: In function 'vmci_host_do_init_context':
>> drivers/misc/vmw_vmci/vmci_host.c:321:9: error: implicit declaration of function 'get_current_cred' [-Werror=implicit-function-declaration]
     cred = get_current_cred();
            ^~~~~~~~~~~~~~~~
>> drivers/misc/vmw_vmci/vmci_host.c:321:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     cred = get_current_cred();
          ^
>> drivers/misc/vmw_vmci/vmci_host.c:326:2: error: implicit declaration of function 'put_cred' [-Werror=implicit-function-declaration]
     put_cred(cred);
     ^~~~~~~~
   cc1: some warnings being treated as errors

vim +/get_current_cred +321 drivers/misc/vmw_vmci/vmci_host.c

8bf50399 George Zhang 2013-01-08  315  	if (init_block.flags & ~VMCI_PRIVILEGE_FLAG_RESTRICTED) {
8bf50399 George Zhang 2013-01-08  316  		vmci_ioctl_err("unsupported VMCI restriction flag\n");
8bf50399 George Zhang 2013-01-08  317  		retval = -EINVAL;
8bf50399 George Zhang 2013-01-08  318  		goto out;
8bf50399 George Zhang 2013-01-08  319  	}
8bf50399 George Zhang 2013-01-08  320  
8bf50399 George Zhang 2013-01-08 @321  	cred = get_current_cred();
8bf50399 George Zhang 2013-01-08  322  	vmci_host_dev->context = vmci_ctx_create(init_block.cid,
8bf50399 George Zhang 2013-01-08  323  						 init_block.flags, 0,
8bf50399 George Zhang 2013-01-08  324  						 vmci_host_dev->user_version,
8bf50399 George Zhang 2013-01-08  325  						 cred);
8bf50399 George Zhang 2013-01-08 @326  	put_cred(cred);
8bf50399 George Zhang 2013-01-08  327  	if (IS_ERR(vmci_host_dev->context)) {
8bf50399 George Zhang 2013-01-08  328  		retval = PTR_ERR(vmci_host_dev->context);
8bf50399 George Zhang 2013-01-08  329  		vmci_ioctl_err("error initializing context\n");

:::::: The code at line 321 was first introduced by commit
:::::: 8bf503991f87e32ea42a7bd69b79ba084fddc5d7 VMCI: host side driver implementation.

:::::: TO: George Zhang <georgezhang@...are.com>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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