* [kvm:queue 40/54] arch/s390/kvm/../../../virt/kvm/eventfd.c:198:23: error: passing argument 1 of 'eventfd_ctx_do_read' from incompatible pointer type
@ 2020-11-09 15:49 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2020-11-09 15:49 UTC (permalink / raw)
To: David Woodhouse
Cc: kbuild-all, kvm, Robert Hu, Farrah Chen, Danmei Wei, Paolo Bonzini
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tree: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
head: 3539292abae0518a1d5bee996174d88014865134
commit: 43814676588fa6f849e6ad0ddb4195c8b9fc6030 [40/54] kvm/eventfd: Drain events from eventfd in irqfd_wakeup()
config: s390-randconfig-r035-20201109 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=43814676588fa6f849e6ad0ddb4195c8b9fc6030
git remote add kvm https://git.kernel.org/pub/scm/virt/kvm/kvm.git
git fetch --no-tags kvm queue
git checkout 43814676588fa6f849e6ad0ddb4195c8b9fc6030
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
arch/s390/kvm/../../../virt/kvm/eventfd.c: In function 'irqfd_wakeup':
>> arch/s390/kvm/../../../virt/kvm/eventfd.c:198:23: error: passing argument 1 of 'eventfd_ctx_do_read' from incompatible pointer type [-Werror=incompatible-pointer-types]
198 | eventfd_ctx_do_read(&irqfd->eventfd, &cnt);
| ^~~~~~~~~~~~~~~
| |
| struct eventfd_ctx **
In file included from arch/s390/kvm/../../../virt/kvm/eventfd.c:21:
include/linux/eventfd.h:44:46: note: expected 'struct eventfd_ctx *' but argument is of type 'struct eventfd_ctx **'
44 | void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt);
| ~~~~~~~~~~~~~~~~~~~~^~~
cc1: some warnings being treated as errors
vim +/eventfd_ctx_do_read +198 arch/s390/kvm/../../../virt/kvm/eventfd.c
180
181 /*
182 * Called with wqh->lock held and interrupts disabled
183 */
184 static int
185 irqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key)
186 {
187 struct kvm_kernel_irqfd *irqfd =
188 container_of(wait, struct kvm_kernel_irqfd, wait);
189 __poll_t flags = key_to_poll(key);
190 struct kvm_kernel_irq_routing_entry irq;
191 struct kvm *kvm = irqfd->kvm;
192 unsigned seq;
193 int idx;
194 int ret = 0;
195
196 if (flags & EPOLLIN) {
197 u64 cnt;
> 198 eventfd_ctx_do_read(&irqfd->eventfd, &cnt);
199
200 idx = srcu_read_lock(&kvm->irq_srcu);
201 do {
202 seq = read_seqcount_begin(&irqfd->irq_entry_sc);
203 irq = irqfd->irq_entry;
204 } while (read_seqcount_retry(&irqfd->irq_entry_sc, seq));
205 /* An event has been signaled, inject an interrupt */
206 if (kvm_arch_set_irq_inatomic(&irq, kvm,
207 KVM_USERSPACE_IRQ_SOURCE_ID, 1,
208 false) == -EWOULDBLOCK)
209 schedule_work(&irqfd->inject);
210 srcu_read_unlock(&kvm->irq_srcu, idx);
211 ret = 1;
212 }
213
214 if (flags & EPOLLHUP) {
215 /* The eventfd is closing, detach from KVM */
216 unsigned long iflags;
217
218 spin_lock_irqsave(&kvm->irqfds.lock, iflags);
219
220 /*
221 * We must check if someone deactivated the irqfd before
222 * we could acquire the irqfds.lock since the item is
223 * deactivated from the KVM side before it is unhooked from
224 * the wait-queue. If it is already deactivated, we can
225 * simply return knowing the other side will cleanup for us.
226 * We cannot race against the irqfd going away since the
227 * other side is required to acquire wqh->lock, which we hold
228 */
229 if (irqfd_is_active(irqfd))
230 irqfd_deactivate(irqfd);
231
232 spin_unlock_irqrestore(&kvm->irqfds.lock, iflags);
233 }
234
235 return ret;
236 }
237
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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