[linux-next:master 7538/13846] kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'

kernel test robot <[email protected]>
Newsgroups dev.linux.lists.oe-kbuild-all
Message-ID <[email protected]> 
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6b8c8af514d739d0335f5579b585e02babe8a727
commit: 2178b1a440a1d1c7df1bb527a1ba9f8e471b43a4 [7538/13846] rcutorture: Test RCU readers from hardware interrupt handlers
config: s390-randconfig-001-20260810 (https://download.01.org/0day-ci/archive/20260810/[email protected]/config)
compiler: s390-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260810/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

   include/linux/srcutree.h: Assembler messages:
   include/linux/srcutree.h:304: Warning: missing closing `"'
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>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
>> kernel/rcu/rcutorture.c:2363: Warning: missing closing `"'
   kernel/rcu/rcutorture.c:2368: Warning: missing closing `"'
   kernel/rcu/rcutorture.c:2368: Warning: missing closing `"'
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vim +2363 kernel/rcu/rcutorture.c

  2324	
  2325	/* Return a random protection state mask, but with at least one bit set. */
  2326	static int
  2327	rcutorture_extend_mask(int oldmask, struct torture_random_state *trsp)
  2328	{
  2329		int mask = rcutorture_extend_mask_max();
  2330		unsigned long randmask1 = torture_random(trsp);
  2331		unsigned long randmask2 = randmask1 >> 3;
  2332		unsigned long preempts = RCUTORTURE_RDR_PREEMPT | RCUTORTURE_RDR_SCHED;
  2333		unsigned long preempts_irq = preempts | RCUTORTURE_RDR_IRQ;
  2334		unsigned long bhs = RCUTORTURE_RDR_BH | RCUTORTURE_RDR_RBH;
  2335	
  2336		WARN_ON_ONCE(mask >> RCUTORTURE_RDR_SHIFT_1);  // Can't have reader idx bits.
  2337		/* Mostly only one bit (need preemption!), sometimes lots of bits. */
  2338		if (!(randmask1 & 0x7))
  2339			mask = mask & randmask2;
  2340		else
  2341			mask = mask & (1 << (randmask2 % RCUTORTURE_RDR_NBITS));
  2342	
  2343		// Can't have nested RCU reader without outer RCU reader.
  2344		if (!(mask & RCUTORTURE_RDR_RCU_1) && (mask & RCUTORTURE_RDR_RCU_2)) {
  2345			if (oldmask & RCUTORTURE_RDR_RCU_1)
  2346				mask &= ~RCUTORTURE_RDR_RCU_2;
  2347			else
  2348				mask |= RCUTORTURE_RDR_RCU_1;
  2349		}
  2350	
  2351		/*
  2352		 * Don't mess with interrupt masking in interrupt handlers.
  2353		 */
  2354		if (in_hardirq() || this_cpu_read(torture_in_scf_handler))
  2355			mask &= ~(preempts_irq | bhs);
  2356	
  2357		/*
  2358		 * Can't enable bh w/irq disabled.
  2359		 */
  2360		if (mask & RCUTORTURE_RDR_IRQ)
  2361			mask |= oldmask & bhs;
  2362	
> 2363	
  2364		/*
  2365		 * Ideally these sequences would be detected in debug builds
  2366		 * (regardless of RT), but until then don't stop testing
  2367		 * them on non-RT.
  2368		 */
  2369		if (IS_ENABLED(CONFIG_PREEMPT_RT)) {
  2370			/* Can't modify BH in atomic context */
  2371			if (oldmask & preempts_irq)
  2372				mask &= ~bhs;
  2373			if ((oldmask | mask) & preempts_irq)
  2374				mask |= oldmask & bhs;
  2375		}
  2376	
  2377		return mask ?: RCUTORTURE_RDR_RCU_1;
  2378	}
  2379	

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