[peterz-queue:sched/wip.umcg 6/6] include/linux/entry-common.h:245 irqentry_irq_disable() warn: bitwise AND condition is false here

[peterz-queue:sched/wip.umcg 6/6] include/linux/entry-common.h:245 irqentry_irq_disable() warn: bitwise AND condition is false here

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 3375 bytes --]

CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Peter Zijlstra <peterz@infradead.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wip.umcg
head:   90712a68ed7dfc7f7f099167c58f0f45c1b81da8
commit: 90712a68ed7dfc7f7f099167c58f0f45c1b81da8 [6/6] sched: User Mode Concurency Groups
:::::: branch date: 32 hours ago
:::::: commit date: 32 hours ago
config: x86_64-randconfig-m001-20220117 (https://download.01.org/0day-ci/archive/20220122/202201220722.NKB2tIJb-lkp(a)intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
include/linux/entry-common.h:245 irqentry_irq_disable() warn: bitwise AND condition is false here
include/linux/entry-common.h:232 irqentry_irq_enable() warn: bitwise AND condition is false here

vim +245 include/linux/entry-common.h

a9f3a74a29af09 Thomas Gleixner 2020-07-22  221  
f695568dc39e5b Peter Zijlstra  2022-01-20  222  /**
f695568dc39e5b Peter Zijlstra  2022-01-20  223   * irqentry_irq_enable - Conditionally enable IRQs from exceptions
f695568dc39e5b Peter Zijlstra  2022-01-20  224   *
f695568dc39e5b Peter Zijlstra  2022-01-20  225   * Common code for exceptions to (re)enable IRQs, typically done to allow
f695568dc39e5b Peter Zijlstra  2022-01-20  226   * from-user exceptions to schedule (since they run on the task stack).
f695568dc39e5b Peter Zijlstra  2022-01-20  227   */
f695568dc39e5b Peter Zijlstra  2022-01-20  228  static inline void irqentry_irq_enable(struct pt_regs *regs)
f695568dc39e5b Peter Zijlstra  2022-01-20  229  {
90712a68ed7dfc Peter Zijlstra  2021-12-14  230  	if (!regs_irqs_disabled(regs)) {
f695568dc39e5b Peter Zijlstra  2022-01-20  231  		local_irq_enable();
90712a68ed7dfc Peter Zijlstra  2021-12-14 @232  		if (user_mode(regs) && (current->flags & PF_UMCG_WORKER))
90712a68ed7dfc Peter Zijlstra  2021-12-14  233  			umcg_sys_enter(regs, -1);
90712a68ed7dfc Peter Zijlstra  2021-12-14  234  	}
f695568dc39e5b Peter Zijlstra  2022-01-20  235  }
f695568dc39e5b Peter Zijlstra  2022-01-20  236  
f695568dc39e5b Peter Zijlstra  2022-01-20  237  /**
f695568dc39e5b Peter Zijlstra  2022-01-20  238   * irqentry_irq_disable - Conditionally disable IRQs from exceptions
f695568dc39e5b Peter Zijlstra  2022-01-20  239   *
f695568dc39e5b Peter Zijlstra  2022-01-20  240   * Counterpart of irqentry_irq_enable().
f695568dc39e5b Peter Zijlstra  2022-01-20  241   */
f695568dc39e5b Peter Zijlstra  2022-01-20  242  static inline void irqentry_irq_disable(struct pt_regs *regs)
f695568dc39e5b Peter Zijlstra  2022-01-20  243  {
90712a68ed7dfc Peter Zijlstra  2021-12-14  244  	if (!regs_irqs_disabled(regs)) {
90712a68ed7dfc Peter Zijlstra  2021-12-14 @245  		if (user_mode(regs) && (current->flags & PF_UMCG_WORKER))
90712a68ed7dfc Peter Zijlstra  2021-12-14  246  			umcg_sys_exit(regs);
f695568dc39e5b Peter Zijlstra  2022-01-20  247  		local_irq_disable();
f695568dc39e5b Peter Zijlstra  2022-01-20  248  	}
90712a68ed7dfc Peter Zijlstra  2021-12-14  249  }
f695568dc39e5b Peter Zijlstra  2022-01-20  250  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org