tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core head: a69a38e26e87ddbe993e33b55f693405cd62c76f commit: 18722d63da35b5846c7d79eedd1b35f46eefea07 [101/122] sched/headers, signals: Separate out task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h> config: powerpc-allmodconfig (attached as .config) compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 18722d63da35b5846c7d79eedd1b35f46eefea07 # save the attached .config to linux build tree make.cross ARCH=powerpc
All warnings (new ones prefixed by >>):
drivers/misc/cxl/fault.c: In function 'get_mem_context':
drivers/misc/cxl/fault.c:228:12: error: implicit declaration of function
'next_thread' [-Werror=implicit-function-declaration]
task = next_thread(task);
^~~~~~~~~~~
>> drivers/misc/cxl/fault.c:228:10: warning: assignment makes pointer from
>> integer without a cast [-Wint-conversion]
task = next_thread(task);
^
drivers/misc/cxl/fault.c:229:22: error: implicit declaration of function
'thread_group_leader' [-Werror=implicit-function-declaration]
} while (task && !thread_group_leader(task));
^~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +228 drivers/misc/cxl/fault.c
7b8ad495 Vaibhav Jain 2015-11-24 212 * If we couldn't find the mm context
then use the group
7b8ad495 Vaibhav Jain 2015-11-24 213 * leader to iterate over the task
group and find a task
7b8ad495 Vaibhav Jain 2015-11-24 214 * that gives us mm_struct.
7b8ad495 Vaibhav Jain 2015-11-24 215 */
7b8ad495 Vaibhav Jain 2015-11-24 216 if (unlikely(mm == NULL && ctx->glpid
!= NULL)) {
7b8ad495 Vaibhav Jain 2015-11-24 217
7b8ad495 Vaibhav Jain 2015-11-24 218 rcu_read_lock();
7b8ad495 Vaibhav Jain 2015-11-24 219 task = pid_task(ctx->glpid,
PIDTYPE_PID);
7b8ad495 Vaibhav Jain 2015-11-24 220 if (task)
7b8ad495 Vaibhav Jain 2015-11-24 221 do {
7b8ad495 Vaibhav Jain 2015-11-24 222 mm =
get_task_mm(task);
7b8ad495 Vaibhav Jain 2015-11-24 223 if (mm) {
7b8ad495 Vaibhav Jain 2015-11-24 224
ctx->pid = get_task_pid(task,
7b8ad495 Vaibhav Jain 2015-11-24 225
PIDTYPE_PID);
7b8ad495 Vaibhav Jain 2015-11-24 226 break;
7b8ad495 Vaibhav Jain 2015-11-24 227 }
7b8ad495 Vaibhav Jain 2015-11-24 @228 task =
next_thread(task);
7b8ad495 Vaibhav Jain 2015-11-24 229 } while (task &&
!thread_group_leader(task));
7b8ad495 Vaibhav Jain 2015-11-24 230 rcu_read_unlock();
7b8ad495 Vaibhav Jain 2015-11-24 231
7b8ad495 Vaibhav Jain 2015-11-24 232 /* check if we switched pid */
7b8ad495 Vaibhav Jain 2015-11-24 233 if (ctx->pid != old_pid) {
7b8ad495 Vaibhav Jain 2015-11-24 234 if (mm)
7b8ad495 Vaibhav Jain 2015-11-24 235
pr_devel("%s:pe=%i switch pid %i->%i\n",
7b8ad495 Vaibhav Jain 2015-11-24 236
__func__, ctx->pe, pid_nr(old_pid),
:::::: The code at line 228 was first introduced by commit
:::::: 7b8ad495d59280b634a7b546f4cdf58cf4d65f61 cxl: Fix DSI misses when the
context owning task exits
:::::: TO: Vaibhav Jain <vaib...@linux.vnet.ibm.com>
:::::: CC: Michael Ellerman <m...@ellerman.id.au>
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