tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2019.09.23a head: 97de53b94582c208ee239178b208b8e8b9472585 commit: 89538f9f8dda5e7738d71f179f9321740b680734 [50/77] rcu: Add crude self-test for early boot kfree_rcu() config: sparc64-allmodconfig (attached as .config) compiler: sparc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 89538f9f8dda5e7738d71f179f9321740b680734 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sparc64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <l...@intel.com>
Note: the rcu/dev.2019.09.23a HEAD 97de53b94582c208ee239178b208b8e8b9472585
builds fine.
It only hurts bisectibility.
All error/warnings (new ones prefixed by >>):
kernel//rcu/update.c: In function 'early_boot_test_call_rcu':
>> kernel//rcu/update.c:869:8: error: implicit declaration of function
>> 'kmalloc'; did you mean 'kvmalloc'? [-Werror=implicit-function-declaration]
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
^~~~~~~
kvmalloc
>> kernel//rcu/update.c:869:6: warning: assignment makes pointer from integer
>> without a cast [-Wint-conversion]
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
^
In file included from include/linux/rbtree.h:22:0,
from include/linux/hrtimer.h:16,
from include/linux/interrupt.h:13,
from kernel//rcu/update.c:25:
>> include/linux/rcupdate.h:840:15: error: passing argument 1 of
>> 'kfree_call_rcu' from incompatible pointer type
>> [-Werror=incompatible-pointer-types]
__kfree_rcu(&((___p)->rhf), offsetof(typeof(*(ptr)), rhf)); \
^
include/linux/rcupdate.h:806:18: note: in definition of macro '__kfree_rcu'
kfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
^~~~
>> kernel//rcu/update.c:871:3: note: in expansion of macro 'kfree_rcu'
kfree_rcu(rhp, rh);
^~~~~~~~~
In file included from include/linux/rcupdate.h:171:0,
from include/linux/rbtree.h:22,
from include/linux/hrtimer.h:16,
from include/linux/interrupt.h:13,
from kernel//rcu/update.c:25:
include/linux/rcutree.h:36:6: note: expected 'struct callback_head *' but
argument is of type 'struct callback_head **'
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
^~~~~~~~~~~~~~
cc1: some warnings being treated as errors
--
kernel/rcu/update.c: In function 'early_boot_test_call_rcu':
kernel/rcu/update.c:869:8: error: implicit declaration of function
'kmalloc'; did you mean 'kvmalloc'? [-Werror=implicit-function-declaration]
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
^~~~~~~
kvmalloc
kernel/rcu/update.c:869:6: warning: assignment makes pointer from integer
without a cast [-Wint-conversion]
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
^
In file included from include/linux/rbtree.h:22:0,
from include/linux/hrtimer.h:16,
from include/linux/interrupt.h:13,
from kernel/rcu/update.c:25:
>> include/linux/rcupdate.h:840:15: error: passing argument 1 of
>> 'kfree_call_rcu' from incompatible pointer type
>> [-Werror=incompatible-pointer-types]
__kfree_rcu(&((___p)->rhf), offsetof(typeof(*(ptr)), rhf)); \
^
include/linux/rcupdate.h:806:18: note: in definition of macro '__kfree_rcu'
kfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
^~~~
kernel/rcu/update.c:871:3: note: in expansion of macro 'kfree_rcu'
kfree_rcu(rhp, rh);
^~~~~~~~~
In file included from include/linux/rcupdate.h:171:0,
from include/linux/rbtree.h:22,
from include/linux/hrtimer.h:16,
from include/linux/interrupt.h:13,
from kernel/rcu/update.c:25:
include/linux/rcutree.h:36:6: note: expected 'struct callback_head *' but
argument is of type 'struct callback_head **'
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
^~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/kfree_rcu +871 kernel//rcu/update.c
859
860 static void early_boot_test_call_rcu(void)
861 {
862 static struct rcu_head head;
863 static struct rcu_head shead;
864 struct early_boot_kfree_rcu *rhp;
865
866 call_rcu(&head, test_callback);
867 if (IS_ENABLED(CONFIG_SRCU))
868 call_srcu(&early_srcu, &shead, test_callback);
> 869 rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
870 if (!WARN_ON_ONCE(!rhp))
> 871 kfree_rcu(rhp, rh);
872 }
873
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